十几减9、8、7、6的练习 (2)

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十几减9、8、7、(通用17篇)

十几减9、8、7、(通用17篇)

十几减9、8、7、(通用17篇)十几减9、8、7、篇1示例课题:教学目标1.使学生能够脱离直观,直接用“想加算减”的方法计算.2.培养学生的抽象思维能力.教学重点使学生掌握的计算方法,能正确地进行的计算.教学难点理解用加法算减法的计算方法.教具学具准备口算卡片、投影片等.教学步骤一、铺垫孕伏【演示】1.口算(出示口算卡片)6+4= 6+5= 6+6= 6+7=6+8= 6+9= 6+10=2.()里应填几(出示投影)?6+()=10 6+()=11 6+()=126+()=13 6+()=14 6+()=156+()=16二、探究新知.1.教学例1.教师出示例1.【继续演示课件】提问:我们已经学过减9、减8和减7的题,都是想加算减,那么“11-6”怎么想?得多少?学生说出得数后再指名一学生说说想的过程.教师出示“13-6=□”.【继续演示课件】提问:计算13-6怎样想?让学生翻开书,在例1中的括号和□中填上适当的数,再指名中下生说一遍想的过程.2.教学例2.教师出示例2.【继续演示课件】提问:请同学们看这三道题(手指三道例题),想一想,每道题得数是多少?教师逐个订正完以后,可以引导学生说一说的题怎样算.算的题目,先想6加几得到这个被减数(可手指例题示范),那么想出来的这个数(用例题示范)就是要求的得数.三、全课小结.引导学生总结的口算.随堂练习【继续演示课件】1.“做一做”第1题,出示投影.(1)引导学生看图说意,列式计算.(2)学生填书.2.“做一做”第2题,加减法对比练习.分组进行.6+5= 6+8= 6+6=11-6= 14-6= 12-6=3.“做一做”第3题.学生独立填写,订正时说一说怎样的.6+□=13 6+□=15 6+□=1613-6=□ 15-6=□ 16-6=□布置作业练习四第3~5题.3.11-6= 17-8= 18-9=14-7= 15-6= 16-7=4.9+4= 12-6= 7+5=11-7= 6+8= 16-9=5.学校的胡琴和提琴一共有13把,胡琴有8把,提琴有多少把?板书设计游戏:找朋友游戏目的使学生在轻松活泼的气氛中复习20以内的减法.游戏准备教师制作如下的数字卡和算式卡:游戏过程1.教师发下数字卡和算式卡.十几减9、8、7、篇2教案示例课题:教学目标1.使学生能够脱离直观,直接用“想加算减”的方法计算.2.培养学生的抽象思维能力.教学重点使学生掌握的计算方法,能正确地进行的计算.教学难点理解用加法算减法的计算方法.教具学具准备口算卡片、投影片等.教学步骤一、铺垫孕伏【演示课件】1.口算(出示口算卡片)6+4= 6+5= 6+6= 6+7=6+8= 6+9= 6+10=2.()里应填几(出示投影)?6+()=10 6+()=11 6+()=126+()=13 6+()=14 6+()=156+()=16二、探究新知.教师出示例1.【继续演示课件】提问:我们已经学过减9、减8和减7的题,都是想加算减,那么“11-6”怎么想?得多少?学生说出得数后再指名一学生说说想的过程.教师出示“13-6=□”.【继续演示课件】提问:计算13-6怎样想?让学生翻开书,在例1中的括号和□中填上适当的数,再指名中下生说一遍想的过程.2.教学例2.教师出示例2.【继续演示课件】提问:请同学们看这三道题(手指三道例题),想一想,每道题得数是多少?教师逐个订正完以后,可以引导学生说一说的题怎样算.算的题目,先想6加几得到这个被减数(可手指例题示范),那么想出来的这个数(用例题示范)就是要求的得数.三、全课小结.引导学生总结的口算.随堂练习【继续演示课件】1.“做一做”第1题,出示投影.(1)引导学生看图说意,列式计算.(2)学生填书.2.“做一做”第2题,加减法对比练习.分组进行.6+5= 6+8= 6+6=11-6= 14-6= 12-6=3.“做一做”第3题.学生独立填写,订正时说一说怎样的.6+□=13 6+□=15 6+□=1613-6=□ 15-6=□ 16-6=□布置作业练习四第3~5题.3.11-6= 17-8= 18-9=14-7= 15-6= 16-7=4.9+4= 12-6= 7+5=11-7= 6+8= 16-9=5.学校的胡琴和提琴一共有13把,胡琴有8把,提琴有多少把?板书设计探究活动游戏:找朋友游戏目的使学生在轻松活泼的气氛中复习20以内的减法.游戏准备教师制作如下的数字卡和算式卡:游戏过程1.教师发下数字卡和算式卡.十几减9、8、7、篇3教案示例一课题:教学目标1.使学生学会运用加、减法的关系,正确计算.2.培养学生初步的迁移、类推能力.3.培养学生动手、动口、动脑的协调性.教学重点使学生掌握的计算方法,能正确进行的计算.教学难点掌握用加法算减法的计算方法.教学步骤一、铺垫孕伏【演示课件】7+()=11 7+()=137+()=15 7+()=16二、探究新知.1.教学例1.(1)【继续演示课件】,出示例1图.(2)启发学生说明图意.使学生明确:从12个圆片中,去掉7个,还剩几个?(3)启发学生回忆:十几减9、十几减8是怎样计算的?小组讨论交流,使学生明确:十几减9、十几减8都是想加算减的.(4)例1应该怎样想?分组交流,并填书;教师巡视指导.使学生明确:像十几减9、十几减8那样,,可先想7加几得十几.12-7=□想:7加()得12,7加5得12,所以12-7=5.(5)读算式: 12-7=5.2.【继续演示课件】,出示例2:11-7=□ 15-7=□(1)分组交流.(2)指导学生独立填写.(3)订正时,读算式11-7=4, 15-7=8.3.【继续演示课件】,出示例3:14-7=□ 16-7=□ 13-7=□(1)独立填写.(2)订正时,读算式14-7=7,16-7=9,13-7=6.三、全课小结.教师引导学生总结的口算.随堂练习1.“做一做”第1题.7+5= 7+7= 7+8=12-7= 14-7= 15-7=一组一组地出示,做减法时说一说都是怎样想的.2.“做一做”第2题.7+□=11 7+□=13 7+□=1611-7=□ 13-7=□ 16-7=□学生无独立填写,订正时说一说是怎样想的.布置作业1.2.11-7= 13-7= 15-7=12-7= 14-7= 16-7=板书设计教案示例二课题:求另一个加数的减法应用题教学目标1.使学生初步学会解答求另一个加数的减法应用题.2.使学生知道简单应用题的结构和解题步骤.理解“求另一个加数的减法应用题”的数量关系,培养学生认真审题的学习习惯.3.通过比较例4和例5两种应用题的异同点,初步培养学生的观察和分析能力.教学重点求一个加数的减法应用题.教学难点根据数量关系灵活地选择解答方法.教学步骤一、铺垫孕伏【演示课件“求另一个加数的减法应用题”】1.口算:14-8= 15-9= 12-7=15-7=7+5= 13-8= 7+8= 11-8=13-7= 17-9= 16-7= 12-9=2.3.(1)(2)二、教学例4.由复习题3(1)引出例4.可以设计情境:草地上跑来7只白兔,又跑来5只黑兔.(1)引导学生根据情境提出问题.【继续演示课件“求另一个加数的减法应用题”】,出示例4.(2)正确读题.(3)指名找出两个已知条件和一个问题.教师在原题上画批.(4)根据条件和问题出示兔图.结合图教师提问:要求一共有多少只两个同学互相说一说,并在练习本上列式计算出结果.请一名学生口述,教师板书.(5)列式计算 7+5=12(只).(6)口答:一共有12只兔.集体订正后师问:这道题为什么用加法解答?(求一共养多少只兔,就要把7只白兔和5只黑兔合起来,所以用加法解答)2.教学例5.【继续演示课件“求另一个加数的减法应用题”】由复习题3(2)引出例5.(1)学生读题.(2)指名叙述题意,说出已知条件的问题.同时教师出示:(3)比较例4和例5的相同点和不同点.(4)教师引导学生把两幅图联系起来说明:白兔的只数加上黑兔的只数一共是12只,白兔有7只,去掉白兔,剩下的就是黑兔.提问:求黑兔有几只,用什么方法计算?引导学生联系减法的含义:从一个数里去掉一部分,求另一部分用减法计算.算式为12-7=5(只).3.比较.师:这两道应用题有哪些地方相同?哪些地方不同?让学生充分发表意见,然后师生共同总结归纳出结果:相同的地方是:学校养7只白兔.不同的地方是:两个已知条件中的一个不同,问题也不同,解答方法也不同.师:什么时候用加法解答?什么时候用减法解答?(求两数和,用加法.已知和与一个加数,求另一个加数,用减法)三、全课小结.请同学们汇报这节课你又学会了什么知识?随堂练习1.小明家有7条白金鱼,8条红金鱼,一共有多少条金鱼?2.小明家有白金鱼和红金鱼一共15条.白金鱼有7条,红金鱼有几条?学生独立完成,然后订正,请学生说出想的过程.布置作业练习三10、11板书设计探究活动游戏:找朋友游戏目的使学生在轻松活泼的气氛中复习20以内的减法.游戏准备教师制作如下的数字卡和算式卡:游戏过程1.教师发下数字卡和算式卡.2.游戏过程举例:拿着的同学说:“我的朋友在哪里?”,拿着卡片的同学就回答:“你的朋友在这里”,并立刻走到拿的同学身边.其它的同学一起读:10减3等于7,对对对,请上位.十几减9、8、7、篇4教案示例课题:教学目标1.使学生掌握的计算方法,能正确进行的口算.2.使学生能利用知识间的内在联系进行迁移类推,提高学生的抽象思维能力.教学重点使学生掌握的计算方法,正确计算.教学难点灵活运用十几减几的口算方法.教具学具准备口算卡片、投影片等.教学步骤一、铺垫孕伏.1.口算【演示课件】2+9= 3+8= 4+7= 5+6=3+9= 4+8= 5+7= 6+6=4+9= 5+8= 6+7= 7+6=5+9= 6+8= 7+7= 8+6=2.()里应填几?【继续演示课件】5+()=11 4+()=12 5+()=144+()=11 2+()=11 3+()=12二、探究新知.1.教学例1.【继续演示课件】(1)出示例1:11-5=□.①启发学生,分组讨论、交流.②汇报时,说一说是怎样想的.鼓励学生运用多种思维,开发学生思维.想加算减;数的组成;因为11-6=5,所以11-5=6;……③启发学生想:十几减5还有哪些题?怎样计算?使学生明确:11-5=612-5=713-5=814-5=915-5=10(2)出示例1:12-4=□.①启发学生分级讨论、交流.②联系本题,说一说你是怎样想的?③启发学生想:十几减4还有哪些题?怎样计算?使学生明确:11-4=712-4=813-4=914-4=102.教学例2.【继续演示课件】(1)分级讨论、交流,十几减3、十几减2有哪些题,怎样计算?(2)汇报时,使学生明确:11-3=8 11-2=912-3=9 12-2=1013-3=103.引导学生对比.启发想的计算可以怎样想?使学生明确.想加算减;想十几的组成;想:11-5=6→11-6=5 ……11-4=7→11-7=4 ……11-3=8→11-8=3 ……11-2=9→11-9=2 ……三、全课小结.略.随堂练习1.“做一做”第1题【继续演示课件】,投影出示,启发学生说明图意,独立填写.2.“做一做”第2题【继续演示课件】,口算,竞赛.3.练习五第3题【继续演示课件】,分级讨论交流,独立填写.(此题渗透统计思想,必要时教师做一下说明.)布置作业练习五第4、5题(图片“练习四”、“练习五”).板书设计十几减9、8、7、篇5教学内容:苏教版第二册第1页的例题、“试一试”,第2页的“想想做做”的习题。

20以内的进位加法和退位减法

20以内的进位加法和退位减法
3、建立错题病因卡,每个孩子当医 生找准错因,对症下药。
4、以3分钟口算,比比哪个组算得 快,同桌互算等多种多样的形 式,坚持天天练,不断线。
11 3
3
7 2
116页
知道的 要求的
这是第一次出现表格应用题. 首先要引导学生看懂表格:说一件什么事 然后想:知道什么数学信息?要求什么? 接着 看:“一共画”是什么意思?确定方法
用直尺数。从9往后数5个数: 10、11、12、13、14,所以9+5=14
9
5
10
4
14
9
5
9
5
1个十
4个一
14
9 + 5= 14 14 10
9 + 5 = 14 45
10
9和1凑成10,把5 分成1和4,9加1等于 10,10再加4等于14, 所以9+5=14
5和5凑成10,把9分成 4和5,5加5等于10,
10

8、7、6加几
8+5= 13 想: 5加( 5 )得10。
35
10加( 3)得( 13 )。
10
8、7、6加几
8+9= 17
27 10
想: 8加( 2)得10。 10加( 7)得( 17)。
计算又对又快的方法:
1、熟练掌握10以内数的组成,尤其 是10的组成。
2、熟练地掌握7+6=13 8+6=14 这 些 易错题的算理和算法。
教学重点:
理解20以内的进位加的算 理、掌握计算的方法。
教学难点:
两个加数比较接近的进位 加法。
(一) :20以内的进位加法:
鼓励学生运用多种方法计算的同 时,要引导学生掌握“凑十法” 。
9加几的进位加法

一年级十几减8的退位减法计算题

一年级十几减8的退位减法计算题

一年级十几减8的退位减法计算题班级 姓名11 -8 =14 -8 =18 -8 =14 -8 = 15 -8 =10 -8 =10 -8 =11 -8 = 19 -8 =18 -8 =15 -8 =16 -8 = 11 -8 =10 -8 =11 -8 =12 -8 = 16 -8 =19 -8 =10 -8 =12 -8 = 10 -8 =15 -8 =18 -8 =14 -8 = 15 -8 =17 -8 =17 -8 =10 -8 = 14 -8 =18 -8 =18 -8 =12 -8 = 16 -8 =12 -8 =16 -8 =13 -8 = 13 -8 =10 -8 =17 -8 =13 -8 = 12 -8 =14 -8 =17 -8 =17 -8 =10 -8 =13 -8 =10 -8 =16 -8 =11 -8 =17 -8 =11 -8 =14 -8 =12 -8 =14 -8 =19 -8 =13 -8 = 16 -8 =14 -8 =12 -8 =15 -8 =18 -8 =14 -8 =10 -8 =17 -8 =19 -8 =10 -8 =13 -8 =10 -8 = 19 -8 =13 -8 =16 -8 =19 -8 = 12 -8 =18 -8 =16 -8 =13 -8 = 16 -8 =16 -8 =10 -8 =19 -8 = 18 -8 =16 -8 =12 -8 =13 -8 = 12 -8 =17 -8 =10 -8 =12 -8 = 19 -8 =11 -8 =18 -8 =15 -8 = 14 -8 =15 -8 =17 -8 =10 -8 = 19 -8 =17 -8 =14 -8 =18 -8 =一年级十几减8的退位减法计算题班级 姓名18 -8 =19 -8 =10 -8 =14 -8 = 11 -8 =18 -8 =13 -8 =17 -8 = 11 -8 =11 -8 =15 -8 =17 -8 = 18 -8 =10 -8 =12 -8 =14 -8 = 13 -8 =18 -8 =12 -8 =19 -8 = 13 -8 =10 -8 =17 -8 =10 -8 = 13 -8 =12 -8 =16 -8 =12 -8 = 12 -8 =16 -8 =12 -8 =17 -8 = 10 -8 =16 -8 =17 -8 =10 -8 = 10 -8 =15 -8 =19 -8 =19 -8 = 17 -8 =18 -8 =10 -8 =16 -8 = 14 -8 =10 -8 =13 -8 =16 -8 =13 -8 =17 -8 =13 -8 =14 -8 =14 -8 =15 -8 =12 -8 =15 -8 = 17 -8 =17 -8 =18 -8 =14 -8 = 19 -8 =19 -8 =13 -8 =10 -8 = 19 -8 =11 -8 =18 -8 =16 -8 = 16 -8 =14 -8 =17 -8 =19 -8 = 16 -8 =18 -8 =19 -8 =14 -8 = 13 -8 =15 -8 =19 -8 =15 -8 = 19 -8 =11 -8 =15 -8 =16 -8 = 13 -8 =10 -8 =11 -8 =10 -8 = 16 -8 =19 -8 =16 -8 =12 -8 = 10 -8 =12 -8 =11 -8 =19 -8 = 16 -8 =15 -8 =14 -8 =15 -8 = 18 -8 =17 -8 =10 -8 =12 -8 =一年级十几减8的退位减法计算题班级 姓名11 -8 =19 -8 =14 -8 =18 -8 = 14 -8 =12 -8 =18 -8 =12 -8 =10 -8 =12 -8 =11 -8 =18 -8 =11 -8 =10 -8 =16 -8 =17 -8 = 14 -8 =12 -8 =19 -8 =15 -8 = 14 -8 =17 -8 =10 -8 =16 -8 = 16 -8 =15 -8 =10 -8 =14 -8 = 16 -8 =16 -8 =16 -8 =12 -8 = 15 -8 =17 -8 =19 -8 =14 -8 = 17 -8 =15 -8 =10 -8 =10 -8 =10 -8 =15 -8 =16 -8 =18 -8 =11 -8 =12 -8 =14 -8 =13 -8 = 10 -8 =18 -8 =13 -8 =12 -8 = 12 -8 =14 -8 =16 -8 =19 -8 = 14 -8 =19 -8 =17 -8 =19 -8 = 10 -8 =19 -8 =14 -8 =16 -8 = 14 -8 =16 -8 =15 -8 =18 -8 = 13 -8 =18 -8 =19 -8 =12 -8 = 10 -8 =12 -8 =14 -8 =11 -8 = 18 -8 =12 -8 =14 -8 =17 -8 = 15 -8 =17 -8 =15 -8 =16 -8 = 11 -8 =12 -8 =15 -8 =13 -8 =17 -8 =13 -8 =14 -8 =10 -8 =18 -8 =15 -8 =17 -8 =13 -8 = 11 -8 =14 -8 =16 -8 =19 -8 = 18 -8 =15 -8 =19 -8 =16 -8 =一年级十几减8的退位减法计算题班级 姓名10 -8 =18 -8 =12 -8 =14 -8 =11 -8 =14 -8 =11 -8 =14 -8 = 19 -8 =10 -8 =11 -8 =15 -8 = 18 -8 =19 -8 =19 -8 =17 -8 = 13 -8 =14 -8 =19 -8 =13 -8 =10 -8 =15 -8 =19 -8 =11 -8 =11 -8 =19 -8 =15 -8 =11 -8 = 10 -8 =14 -8 =15 -8 =11 -8 = 16 -8 =15 -8 =12 -8 =16 -8 = 18 -8 =15 -8 =11 -8 =13 -8 = 12 -8 =11 -8 =16 -8 =17 -8 = 12 -8 =10 -8 =11 -8 =12 -8 = 17 -8 =18 -8 =14 -8 =16 -8 = 10 -8 =19 -8 =11 -8 =10 -8 = 16 -8 =19 -8 =15 -8 =15 -8 = 12 -8 =12 -8 =17 -8 =10 -8 = 11 -8 =13 -8 =13 -8 =19 -8 = 13 -8 =18 -8 =16 -8 =11 -8 = 10 -8 =11 -8 =15 -8 =15 -8 = 17 -8 =14 -8 =17 -8 =15 -8 = 19 -8 =15 -8 =11 -8 =15 -8 = 10 -8 =17 -8 =17 -8 =17 -8 = 10 -8 =19 -8 =16 -8 =12 -8 = 10 -8 =13 -8 =19 -8 =18 -8 = 15 -8 =17 -8 =16 -8 =13 -8 = 17 -8 =13 -8 =16 -8 =18 -8 =一年级十几减8的退位减法计算题班级 姓名10 -8 =13 -8 =17 -8 =13 -8 = 10 -8 =17 -8 =15 -8 =11 -8 = 16 -8 =14 -8 =17 -8 =11 -8 = 15 -8 =12 -8 =13 -8 =13 -8 = 13 -8 =18 -8 =13 -8 =13 -8 = 10 -8 =17 -8 =15 -8 =15 -8 = 16 -8 =10 -8 =12 -8 =19 -8 = 12 -8 =18 -8 =18 -8 =16 -8 = 19 -8 =19 -8 =13 -8 =11 -8 = 17 -8 =14 -8 =15 -8 =18 -8 = 19 -8 =11 -8 =15 -8 =14 -8 = 18 -8 =18 -8 =13 -8 =14 -8 = 18 -8 =19 -8 =15 -8 =18 -8 = 12 -8 =13 -8 =14 -8 =10 -8 = 12 -8 =14 -8 =19 -8 =14 -8 = 11 -8 =14 -8 =12 -8 =12 -8 = 15 -8 =16 -8 =13 -8 =13 -8 = 17 -8 =16 -8 =19 -8 =10 -8 = 12 -8 =13 -8 =10 -8 =15 -8 = 17 -8 =17 -8 =12 -8 =13 -8 =15 -8 =18 -8 =12 -8 =17 -8 =16 -8 =13 -8 =13 -8 =15 -8 = 16 -8 =14 -8 =17 -8 =19 -8 = 16 -8 =17 -8 =12 -8 =14 -8 = 12 -8 =17 -8 =13 -8 =17 -8 = 19 -8 =19 -8 =14 -8 =13 -8 =一年级十几减8的退位减法计算题班级 姓名18 -8 =19 -8 =10 -8 =12 -8 = 13 -8 =19 -8 =11 -8 =15 -8 = 12 -8 =18 -8 =10 -8 =17 -8 = 18 -8 =13 -8 =13 -8 =10 -8 = 16 -8 =18 -8 =12 -8 =13 -8 = 12 -8 =10 -8 =13 -8 =11 -8 = 15 -8 =18 -8 =12 -8 =19 -8 = 13 -8 =18 -8 =15 -8 =19 -8 = 11 -8 =12 -8 =15 -8 =16 -8 = 17 -8 =19 -8 =14 -8 =12 -8 = 10 -8 =13 -8 =13 -8 =19 -8 = 19 -8 =19 -8 =14 -8 =14 -8 = 16 -8 =16 -8 =14 -8 =11 -8 =16 -8 =17 -8 =17 -8 =16 -8 =17 -8 =19 -8 =13 -8 =13 -8 = 19 -8 =13 -8 =11 -8 =13 -8 = 18 -8 =16 -8 =10 -8 =18 -8 = 17 -8 =17 -8 =10 -8 =10 -8 = 17 -8 =10 -8 =18 -8 =12 -8 = 12 -8 =17 -8 =16 -8 =14 -8 = 10 -8 =14 -8 =10 -8 =16 -8 = 12 -8 =12 -8 =12 -8 =18 -8 = 15 -8 =15 -8 =15 -8 =13 -8 = 10 -8 =18 -8 =18 -8 =15 -8 = 13 -8 =13 -8 =11 -8 =16 -8 = 12 -8 =18 -8 =11 -8 =17 -8 =一年级十几减8的退位减法计算题班级 姓名18 -8 =17 -8 =12 -8 =14 -8 =19 -8 =17 -8 =16 -8 =12 -8 = 14 -8 =15 -8 =18 -8 =13 -8 = 16 -8 =18 -8 =15 -8 =14 -8 = 16 -8 =14 -8 =19 -8 =10 -8 = 12 -8 =19 -8 =13 -8 =16 -8 = 16 -8 =12 -8 =15 -8 =10 -8 = 19 -8 =14 -8 =17 -8 =12 -8 = 18 -8 =17 -8 =12 -8 =12 -8 = 12 -8 =18 -8 =19 -8 =19 -8 = 17 -8 =14 -8 =17 -8 =17 -8 = 10 -8 =19 -8 =16 -8 =16 -8 = 17 -8 =12 -8 =19 -8 =17 -8 = 14 -8 =12 -8 =13 -8 =19 -8 = 13 -8 =13 -8 =15 -8 =11 -8 = 12 -8 =15 -8 =18 -8 =12 -8 = 12 -8 =15 -8 =18 -8 =17 -8 = 14 -8 =16 -8 =14 -8 =11 -8 = 19 -8 =18 -8 =19 -8 =14 -8 = 13 -8 =17 -8 =13 -8 =14 -8 = 13 -8 =18 -8 =17 -8 =18 -8 =18 -8 =11 -8 =15 -8 =19 -8 =19 -8 =17 -8 =12 -8 =15 -8 = 15 -8 =19 -8 =14 -8 =11 -8 =15 -8 =13 -8 =19 -8 =11 -8 =16 -8 =16 -8 =13 -8 =10 -8 =一年级十几减8的退位减法计算题班级 姓名19 -8 =18 -8 =11 -8 =19 -8 = 15 -8 =13 -8 =12 -8 =16 -8 = 12 -8 =11 -8 =17 -8 =11 -8 = 16 -8 =17 -8 =17 -8 =12 -8 = 12 -8 =16 -8 =19 -8 =12 -8 = 18 -8 =11 -8 =17 -8 =10 -8 = 16 -8 =17 -8 =11 -8 =16 -8 = 10 -8 =10 -8 =11 -8 =12 -8 = 16 -8 =15 -8 =19 -8 =16 -8 = 18 -8 =15 -8 =19 -8 =10 -8 =15 -8 =14 -8 =17 -8 =16 -8 =16 -8 =13 -8 =10 -8 =15 -8 = 18 -8 =15 -8 =10 -8 =17 -8 = 10 -8 =15 -8 =11 -8 =11 -8 = 10 -8 =17 -8 =14 -8 =19 -8 = 19 -8 =13 -8 =11 -8 =19 -8 = 10 -8 =16 -8 =17 -8 =15 -8 = 19 -8 =10 -8 =16 -8 =15 -8 = 14 -8 =14 -8 =13 -8 =11 -8 = 11 -8 =16 -8 =16 -8 =15 -8 = 14 -8 =13 -8 =17 -8 =10 -8 = 14 -8 =10 -8 =10 -8 =11 -8 = 16 -8 =13 -8 =19 -8 =16 -8 = 11 -8 =15 -8 =10 -8 =19 -8 =18 -8 =14 -8 =17 -8 =12 -8 =19 -8 =14 -8 =19 -8 =13 -8 =一年级十几减8的退位减法计算题班级 姓名17 -8 =11 -8 =13 -8 =11 -8 =18 -8 =13 -8 =17 -8 =13 -8 =13 -8 =13 -8 =12 -8 =17 -8 =14 -8 =13 -8 =11 -8 =19 -8 = 16 -8 =17 -8 =19 -8 =11 -8 = 12 -8 =19 -8 =14 -8 =14 -8 = 12 -8 =16 -8 =14 -8 =17 -8 = 10 -8 =13 -8 =18 -8 =14 -8 = 15 -8 =18 -8 =11 -8 =19 -8 = 13 -8 =12 -8 =12 -8 =10 -8 = 12 -8 =16 -8 =11 -8 =18 -8 = 10 -8 =13 -8 =19 -8 =19 -8 = 10 -8 =12 -8 =15 -8 =12 -8 = 10 -8 =12 -8 =13 -8 =18 -8 = 17 -8 =13 -8 =17 -8 =12 -8 = 14 -8 =18 -8 =15 -8 =12 -8 = 16 -8 =12 -8 =11 -8 =18 -8 = 10 -8 =11 -8 =18 -8 =10 -8 = 10 -8 =10 -8 =10 -8 =17 -8 = 12 -8 =18 -8 =19 -8 =19 -8 = 10 -8 =10 -8 =16 -8 =10 -8 =14 -8 =19 -8 =11 -8 =10 -8 =15 -8 =15 -8 =18 -8 =15 -8 = 10 -8 =15 -8 =14 -8 =17 -8 = 14 -8 =16 -8 =14 -8 =19 -8 = 17 -8 =14 -8 =18 -8 =12 -8 =一年级十几减8的退位减法计算题班级 姓名19 -8 =13 -8 =17 -8 =15 -8 = 14 -8 =16 -8 =13 -8 =16 -8 = 17 -8 =18 -8 =18 -8 =11 -8 = 17 -8 =12 -8 =10 -8 =10 -8 = 17 -8 =13 -8 =13 -8 =14 -8 = 10 -8 =16 -8 =11 -8 =11 -8 = 13 -8 =14 -8 =18 -8 =16 -8 = 15 -8 =16 -8 =15 -8 =15 -8 = 13 -8 =16 -8 =14 -8 =10 -8 = 11 -8 =16 -8 =19 -8 =19 -8 = 13 -8 =13 -8 =10 -8 =10 -8 =18 -8 =10 -8 =15 -8 =14 -8 =19 -8 =13 -8 =12 -8 =18 -8 = 15 -8 =10 -8 =14 -8 =12 -8 = 11 -8 =14 -8 =18 -8 =19 -8 = 16 -8 =12 -8 =17 -8 =17 -8 = 16 -8 =14 -8 =18 -8 =13 -8 = 14 -8 =15 -8 =16 -8 =12 -8 = 11 -8 =18 -8 =19 -8 =12 -8 = 13 -8 =16 -8 =13 -8 =10 -8 = 11 -8 =14 -8 =14 -8 =19 -8 = 19 -8 =16 -8 =14 -8 =17 -8 = 15 -8 =15 -8 =17 -8 =12 -8 = 18 -8 =17 -8 =10 -8 =12 -8 = 11 -8 =17 -8 =12 -8 =15 -8 = 11 -8 =13 -8 =18 -8 =13 -8 =一年级十几减8的退位减法计算题班级 姓名12 -8 =11 -8 =10 -8 =15 -8 = 11 -8 =18 -8 =11 -8 =16 -8 = 15 -8 =15 -8 =11 -8 =17 -8 =11 -8 =16 -8 =12 -8 =15 -8 =12 -8 =10 -8 =15 -8 =16 -8 = 14 -8 =17 -8 =10 -8 =17 -8 = 10 -8 =12 -8 =12 -8 =16 -8 = 15 -8 =14 -8 =15 -8 =17 -8 = 14 -8 =19 -8 =14 -8 =17 -8 = 17 -8 =11 -8 =15 -8 =15 -8 = 19 -8 =14 -8 =16 -8 =19 -8 = 18 -8 =10 -8 =10 -8 =11 -8 = 15 -8 =17 -8 =19 -8 =12 -8 = 15 -8 =14 -8 =13 -8 =12 -8 = 12 -8 =17 -8 =16 -8 =11 -8 = 18 -8 =13 -8 =12 -8 =12 -8 = 18 -8 =10 -8 =17 -8 =14 -8 = 11 -8 =10 -8 =18 -8 =11 -8 = 18 -8 =13 -8 =18 -8 =18 -8 = 14 -8 =19 -8 =11 -8 =16 -8 = 14 -8 =12 -8 =17 -8 =11 -8 = 12 -8 =15 -8 =14 -8 =13 -8 = 16 -8 =17 -8 =14 -8 =10 -8 = 18 -8 =17 -8 =10 -8 =17 -8 = 18 -8 =18 -8 =14 -8 =16 -8 = 14 -8 =15 -8 =13 -8 =19 -8 =一年级十几减8的退位减法计算题班级 姓名13 -8 =17 -8 =17 -8 =11 -8 =14 -8 =13 -8 =14 -8 =12 -8 = 12 -8 =12 -8 =14 -8 =13 -8 = 15 -8 =12 -8 =14 -8 =13 -8 = 15 -8 =16 -8 =17 -8 =10 -8 =13 -8 =19 -8 =16 -8 =16 -8 =14 -8 =19 -8 =13 -8 =19 -8 = 13 -8 =10 -8 =17 -8 =15 -8 = 13 -8 =16 -8 =18 -8 =18 -8 = 11 -8 =17 -8 =19 -8 =12 -8 = 13 -8 =11 -8 =18 -8 =19 -8 = 12 -8 =12 -8 =19 -8 =13 -8 = 16 -8 =10 -8 =12 -8 =14 -8 = 19 -8 =13 -8 =15 -8 =11 -8 = 11 -8 =15 -8 =19 -8 =13 -8 = 13 -8 =19 -8 =16 -8 =12 -8 = 15 -8 =18 -8 =14 -8 =14 -8 = 14 -8 =14 -8 =10 -8 =12 -8 = 19 -8 =19 -8 =14 -8 =19 -8 = 13 -8 =15 -8 =13 -8 =16 -8 = 15 -8 =11 -8 =18 -8 =14 -8 = 19 -8 =17 -8 =15 -8 =17 -8 = 19 -8 =15 -8 =13 -8 =11 -8 =13 -8 =11 -8 =11 -8 =13 -8 =14 -8 =10 -8 =12 -8 =17 -8 = 13 -8 =12 -8 =14 -8 =17 -8 =一年级十几减8的退位减法计算题班级 姓名18 -8 =12 -8 =13 -8 =15 -8 = 16 -8 =10 -8 =11 -8 =16 -8 = 13 -8 =17 -8 =14 -8 =11 -8 =15 -8 =13 -8 =16 -8 =18 -8 =16 -8 =14 -8 =19 -8 =18 -8 =16 -8 =11 -8 =13 -8 =16 -8 =17 -8 =13 -8 =16 -8 =19 -8 = 12 -8 =12 -8 =18 -8 =14 -8 = 10 -8 =16 -8 =18 -8 =15 -8 = 12 -8 =11 -8 =15 -8 =10 -8 = 15 -8 =12 -8 =17 -8 =15 -8 = 13 -8 =11 -8 =14 -8 =12 -8 = 15 -8 =18 -8 =10 -8 =19 -8 = 10 -8 =17 -8 =13 -8 =12 -8 = 19 -8 =12 -8 =16 -8 =18 -8 = 14 -8 =17 -8 =16 -8 =12 -8 = 19 -8 =16 -8 =17 -8 =16 -8 = 16 -8 =10 -8 =15 -8 =17 -8 =15 -8 =10 -8 =14 -8 =11 -8 =16 -8 =14 -8 =13 -8 =19 -8 = 18 -8 =13 -8 =11 -8 =10 -8 = 11 -8 =14 -8 =14 -8 =12 -8 = 19 -8 =15 -8 =11 -8 =19 -8 = 15 -8 =18 -8 =16 -8 =17 -8 = 17 -8 =12 -8 =16 -8 =10 -8 = 15 -8 =13 -8 =13 -8 =12 -8 =一年级十几减8的退位减法计算题班级 姓名11 -8 =14 -8 =10 -8 =18 -8 = 14 -8 =12 -8 =13 -8 =17 -8 = 17 -8 =12 -8 =17 -8 =13 -8 = 12 -8 =12 -8 =18 -8 =15 -8 = 14 -8 =17 -8 =14 -8 =14 -8 = 10 -8 =15 -8 =11 -8 =12 -8 = 19 -8 =18 -8 =16 -8 =16 -8 = 18 -8 =10 -8 =18 -8 =18 -8 = 17 -8 =10 -8 =15 -8 =12 -8 = 14 -8 =19 -8 =12 -8 =14 -8 = 12 -8 =10 -8 =14 -8 =19 -8 = 10 -8 =14 -8 =11 -8 =19 -8 = 13 -8 =11 -8 =12 -8 =12 -8 = 16 -8 =19 -8 =18 -8 =13 -8 = 13 -8 =17 -8 =19 -8 =17 -8 = 10 -8 =18 -8 =14 -8 =17 -8 = 17 -8 =19 -8 =11 -8 =17 -8 = 12 -8 =11 -8 =17 -8 =10 -8 = 11 -8 =12 -8 =18 -8 =18 -8 = 11 -8 =10 -8 =18 -8 =13 -8 = 17 -8 =14 -8 =12 -8 =13 -8 = 10 -8 =12 -8 =15 -8 =13 -8 = 12 -8 =17 -8 =14 -8 =11 -8 = 12 -8 =16 -8 =19 -8 =15 -8 =11 -8 =17 -8 =16 -8 =10 -8 =12 -8 =12 -8 =16 -8 =14 -8 =一年级十几减8的退位减法计算题班级 姓名19 -8 =19 -8 =17 -8 =12 -8 = 13 -8 =16 -8 =13 -8 =14 -8 = 15 -8 =16 -8 =17 -8 =14 -8 = 10 -8 =16 -8 =18 -8 =14 -8 = 16 -8 =15 -8 =13 -8 =19 -8 =18 -8 =14 -8 =11 -8 =15 -8 =19 -8 =14 -8 =19 -8 =12 -8 = 19 -8 =12 -8 =11 -8 =15 -8 = 10 -8 =11 -8 =12 -8 =18 -8 = 13 -8 =11 -8 =10 -8 =11 -8 = 19 -8 =18 -8 =13 -8 =18 -8 = 10 -8 =15 -8 =13 -8 =16 -8 =17 -8 =17 -8 =14 -8 =13 -8 =18 -8 =18 -8 =17 -8 =14 -8 = 15 -8 =12 -8 =18 -8 =18 -8 = 19 -8 =16 -8 =19 -8 =10 -8 = 10 -8 =17 -8 =13 -8 =19 -8 = 14 -8 =10 -8 =14 -8 =16 -8 = 14 -8 =18 -8 =17 -8 =16 -8 = 10 -8 =17 -8 =17 -8 =13 -8 = 17 -8 =12 -8 =16 -8 =10 -8 = 19 -8 =12 -8 =12 -8 =16 -8 = 13 -8 =15 -8 =13 -8 =11 -8 = 10 -8 =17 -8 =11 -8 =16 -8 = 18 -8 =11 -8 =10 -8 =14 -8 = 13 -8 =15 -8 =19 -8 =16 -8 =一年级十几减8的退位减法计算题班级 姓名18 -8 =10 -8 =18 -8 =17 -8 =15 -8 =11 -8 =16 -8 =13 -8 =16 -8 =17 -8 =12 -8 =10 -8 =17 -8 =12 -8 =18 -8 =13 -8 = 10 -8 =11 -8 =16 -8 =10 -8 = 16 -8 =16 -8 =14 -8 =10 -8 = 18 -8 =19 -8 =15 -8 =12 -8 = 13 -8 =14 -8 =18 -8 =11 -8 = 12 -8 =14 -8 =10 -8 =18 -8 = 15 -8 =10 -8 =12 -8 =15 -8 = 10 -8 =11 -8 =14 -8 =17 -8 = 14 -8 =17 -8 =11 -8 =14 -8 = 18 -8 =17 -8 =13 -8 =11 -8 = 18 -8 =11 -8 =18 -8 =15 -8 = 12 -8 =14 -8 =12 -8 =13 -8 = 19 -8 =12 -8 =10 -8 =10 -8 = 12 -8 =16 -8 =17 -8 =14 -8 = 15 -8 =15 -8 =18 -8 =17 -8 = 13 -8 =10 -8 =13 -8 =12 -8 = 11 -8 =17 -8 =18 -8 =15 -8 = 18 -8 =13 -8 =18 -8 =18 -8 = 11 -8 =14 -8 =13 -8 =11 -8 = 16 -8 =11 -8 =17 -8 =15 -8 =12 -8 =12 -8 =16 -8 =18 -8 =13 -8 =18 -8 =19 -8 =17 -8 = 11 -8 =16 -8 =14 -8 =19 -8 =一年级十几减8的退位减法计算题班级 姓名19 -8 =11 -8 =10 -8 =17 -8 = 18 -8 =14 -8 =17 -8 =12 -8 = 10 -8 =13 -8 =15 -8 =12 -8 = 17 -8 =15 -8 =17 -8 =17 -8 = 17 -8 =10 -8 =15 -8 =13 -8 = 15 -8 =15 -8 =12 -8 =17 -8 = 17 -8 =15 -8 =16 -8 =15 -8 = 10 -8 =11 -8 =13 -8 =16 -8 = 16 -8 =12 -8 =17 -8 =16 -8 = 12 -8 =10 -8 =17 -8 =13 -8 = 16 -8 =16 -8 =11 -8 =12 -8 = 15 -8 =18 -8 =11 -8 =19 -8 = 12 -8 =18 -8 =10 -8 =16 -8 = 12 -8 =12 -8 =11 -8 =15 -8 = 10 -8 =13 -8 =17 -8 =16 -8 = 18 -8 =11 -8 =15 -8 =17 -8 = 13 -8 =11 -8 =14 -8 =10 -8 = 16 -8 =10 -8 =10 -8 =18 -8 = 19 -8 =19 -8 =17 -8 =11 -8 = 17 -8 =18 -8 =17 -8 =13 -8 = 17 -8 =10 -8 =16 -8 =11 -8 = 11 -8 =19 -8 =19 -8 =19 -8 = 17 -8 =12 -8 =18 -8 =19 -8 = 15 -8 =16 -8 =13 -8 =11 -8 = 11 -8 =17 -8 =17 -8 =14 -8 = 18 -8 =15 -8 =17 -8 =19 -8 =一年级十几减8的退位减法计算题班级 姓名16 -8 =15 -8 =13 -8 =19 -8 =17 -8 =12 -8 =18 -8 =17 -8 =18 -8 =10 -8 =13 -8 =19 -8 = 12 -8 =14 -8 =19 -8 =16 -8 = 14 -8 =11 -8 =17 -8 =15 -8 = 19 -8 =11 -8 =14 -8 =16 -8 = 13 -8 =13 -8 =17 -8 =10 -8 = 18 -8 =17 -8 =19 -8 =13 -8 = 15 -8 =15 -8 =19 -8 =15 -8 = 13 -8 =18 -8 =11 -8 =12 -8 = 18 -8 =13 -8 =18 -8 =12 -8 =13 -8 =12 -8 =16 -8 =16 -8 =14 -8 =10 -8 =14 -8 =14 -8 = 19 -8 =14 -8 =18 -8 =13 -8 = 11 -8 =17 -8 =19 -8 =13 -8 = 13 -8 =12 -8 =13 -8 =18 -8 = 15 -8 =13 -8 =13 -8 =19 -8 = 14 -8 =11 -8 =18 -8 =17 -8 = 18 -8 =11 -8 =15 -8 =18 -8 = 17 -8 =11 -8 =16 -8 =18 -8 = 12 -8 =17 -8 =19 -8 =10 -8 = 18 -8 =12 -8 =12 -8 =11 -8 =17 -8 =15 -8 =12 -8 =11 -8 =18 -8 =14 -8 =10 -8 =16 -8 = 10 -8 =10 -8 =10 -8 =11 -8 = 15 -8 =13 -8 =15 -8 =12 -8 =一年级十几减8的退位减法计算题班级 姓名16 -8 =10 -8 =11 -8 =19 -8 = 16 -8 =17 -8 =19 -8 =15 -8 = 13 -8 =17 -8 =17 -8 =10 -8 = 12 -8 =17 -8 =15 -8 =16 -8 = 11 -8 =17 -8 =16 -8 =17 -8 = 15 -8 =11 -8 =18 -8 =16 -8 = 17 -8 =11 -8 =17 -8 =16 -8 = 10 -8 =13 -8 =11 -8 =15 -8 = 14 -8 =19 -8 =16 -8 =19 -8 = 12 -8 =13 -8 =10 -8 =17 -8 = 11 -8 =18 -8 =14 -8 =15 -8 = 14 -8 =11 -8 =16 -8 =18 -8 = 13 -8 =15 -8 =14 -8 =15 -8 = 11 -8 =15 -8 =14 -8 =14 -8 = 13 -8 =13 -8 =15 -8 =19 -8 = 15 -8 =16 -8 =13 -8 =15 -8 =14 -8 =15 -8 =11 -8 =10 -8 =15 -8 =12 -8 =11 -8 =11 -8 = 12 -8 =16 -8 =17 -8 =13 -8 = 16 -8 =13 -8 =16 -8 =10 -8 = 13 -8 =19 -8 =15 -8 =14 -8 = 18 -8 =19 -8 =11 -8 =14 -8 = 13 -8 =17 -8 =15 -8 =18 -8 = 19 -8 =11 -8 =16 -8 =14 -8 = 16 -8 =17 -8 =11 -8 =16 -8 = 15 -8 =14 -8 =19 -8 =11 -8 =一年级十几减8的退位减法计算题班级 姓名13 -8 =17 -8 =19 -8 =12 -8 = 13 -8 =16 -8 =14 -8 =14 -8 = 19 -8 =18 -8 =17 -8 =10 -8 = 16 -8 =18 -8 =10 -8 =12 -8 = 13 -8 =11 -8 =14 -8 =13 -8 = 13 -8 =18 -8 =17 -8 =17 -8 = 15 -8 =16 -8 =10 -8 =11 -8 = 14 -8 =15 -8 =13 -8 =15 -8 = 17 -8 =12 -8 =18 -8 =13 -8 = 13 -8 =14 -8 =11 -8 =14 -8 = 10 -8 =14 -8 =13 -8 =12 -8 =18 -8 =10 -8 =19 -8 =16 -8 =19 -8 =19 -8 =19 -8 =13 -8 = 18 -8 =12 -8 =14 -8 =12 -8 = 17 -8 =17 -8 =14 -8 =18 -8 = 10 -8 =10 -8 =13 -8 =17 -8 = 19 -8 =15 -8 =15 -8 =12 -8 = 17 -8 =13 -8 =18 -8 =19 -8 = 10 -8 =17 -8 =10 -8 =12 -8 = 14 -8 =16 -8 =17 -8 =14 -8 = 17 -8 =11 -8 =13 -8 =12 -8 = 17 -8 =18 -8 =11 -8 =16 -8 = 14 -8 =16 -8 =14 -8 =18 -8 = 11 -8 =19 -8 =13 -8 =19 -8 = 13 -8 =18 -8 =11 -8 =16 -8 = 17 -8 =11 -8 =14 -8 =17 -8 =。

人教版2021-2022年小学数学一年级下册口算C卷

人教版2021-2022年小学数学一年级下册口算C卷

人教版2021-2022年小学数学一年级下册口算C卷姓名:________ 班级:________ 成绩:________亲爱的小朋友们,这一段时间的学习,你们收获怎么样呢?今天就让我们来检验一下吧!一、十几减9 (共5题;共25分)1. (5分)填一填,算一算。

(1)(2)(3)(4)2. (5分)(按11、13、17、15、19、14、16、18、-9的顺序)3. (5分) (2020一上·大名期末) 海豚顶球。

(连线)4. (6分)在□里填数5. (4分)根据减法表中的规律填一填。

16-9=-8=-=-=-=-=-13-4=13-5=13-6=13-9=13-8=13-7=二、十几减8、7 (共5题;共26分)6. (5分)在□里填上合适的数,使花瓣上的得数和花蕊上的得数相同。

(1)(2)7. (5分) (2020一上·盘县期末) 直接写出得数。

5+6= 9-8= 9+4= 7+9-6= 8+9= 5+8= 3+9= 14-4+2= 12-2= 1+9= 8-0= 2+7+6= 16-7= 18-10= 12+4= 15-5+6=8. (6分) (2018一上·麒麟期末) 计算我最棒。

5+7=5–4=18–8=8+5+ 2=15–10=6–3=7+7= 3 + 7 + 9=11+7 =2+8=19–10=8 – 3 + 9=8+8=10–8=5+10=12 –2 + 4=10 + 8=11 –10=10 –7=9 + 10 –5=9. (5分) (2019一下·鹿邑月考) 车上原有19名乘客,到某站从前面下车6名,从后面下车9名,现在车上有多少名乘客?10. (5分)魔术师的三角(从上到下填)和为12三、十几减6、5、4、3、2 (共4题;共30分)11. (5分) (2020一上·项城期末)12. (15分) (2018一下·云南月考) 每只小兔子要采16个。

人教版数学一年级下册2.2《十几减8、7、6》说课稿

人教版数学一年级下册2.2《十几减8、7、6》说课稿

人教版数学一年级下册2.2《十几减8、7、6》说课稿一. 教材分析《十几减8、7、6》是人教版数学一年级下册第二单元的内容。

本节课的主要目的是让学生掌握十几减8、7、6的计算方法,并能够灵活运用。

在教材中,通过具体的例子和实践活动,引导学生探索和发现十几减8、7、6的规律,培养学生的逻辑思维能力和解决问题的能力。

二. 学情分析考虑到学生是一年级的学生,他们的思维方式和认知水平有其特点。

他们已经学习了基本的加法和减法运算,但是对于十几减8、7、6这类稍微复杂的计算题目,可能还存在一定的困难。

因此,在教学过程中,需要注重引导学生通过具体的例子和实践活动,去发现和理解十几减8、7、6的规律。

三. 说教学目标1.知识与技能目标:学生能够掌握十几减8、7、6的计算方法,并能够灵活运用。

2.过程与方法目标:通过具体的例子和实践活动,引导学生探索和发现十几减8、7、6的规律,培养学生的逻辑思维能力和解决问题的能力。

3.情感态度与价值观目标:激发学生对数学的兴趣,培养他们积极思考、合作交流的良好学习习惯。

四. 说教学重难点1.教学重点:学生能够掌握十几减8、7、6的计算方法。

2.教学难点:引导学生探索和发现十几减8、7、6的规律。

五. 说教学方法与手段在本节课的教学过程中,我将采用以下教学方法和手段:1.情境教学法:通过具体的例子和实践活动,让学生在实际情境中理解和掌握十几减8、7、6的计算方法。

2.游戏教学法:设计一些有趣的数学游戏,激发学生的学习兴趣,提高他们的学习积极性。

3.小组合作学习:学生进行小组合作交流,培养他们的合作意识和团队精神。

六. 说教学过程1.导入:通过一个有趣的数学故事,引发学生对十几减8、7、6的思考,激发他们的学习兴趣。

2.探究:给学生提供一些具体的例子,引导学生通过实际操作和思考,探索和发现十几减8、7、6的规律。

3.巩固:设计一些练习题目,让学生运用所学的计算方法进行计算,巩固他们的学习成果。

2021年人教版一年级下册重难点题型同步训练:十几减8、7、6(解析版)

2021年人教版一年级下册重难点题型同步训练:十几减8、7、6(解析版)

2021年人教版一年级下册重难点题型同步训练第二章《20以内的退位减法》第二课:十几减8、7、6一、单选题1.(2020一上·嘉陵期末)7+□<16,□里最大填()。

A. 8B. 9C. 10【答案】 A【解析】【解答】解:16-7=9,9-1=8,所以□里最大填8。

故答案为:A。

【分析】先把小于号右边的数减去左边的已知数,然后用得出的数减去1即可。

2.(2020一下·龙岗期末)淘气有14张卡片,送给了笑笑8张,淘气还剩()张卡片。

A. 5B. 6C. 7【答案】 B【解析】【解答】14-8=6(张)故答案为:B。

【分析】根据题意可知,用淘气的卡片张数-送给笑笑的卡片张数=淘气还剩的卡片张数,据此列式解答。

3.(2020一下·龙华期中)11人用餐,准备了7张椅子,每人坐一张椅子,还差()张椅子。

A. 4B. 3C. 2【答案】 A【解析】【解答】11-7=4(张).故答案为:A.【分析】根据题意可知,每人坐一张椅子,11个人,已经准备了7张椅子,要求还差几张椅子,用减法计算,据此列式解答.4.(2020一下·鹿邑月考)( )比13少7。

A. 5B. 6C. 7【答案】 B【解析】【解答】13-7=6故答案为:B【分析】比一个数少几,运用减法计算。

5.()-6=7,()里应该填()。

A. 14B. 13C. 12【答案】 B【解析】【解答】解:13-6=7。

故答案为:B。

【分析】被减数=减数+差。

6.(2020二下·云南期中)14个同学去划船,租了两条船,一条船上坐了8人,另一条船上坐了()人。

A. 14÷2B. 14-2C. 14-8【答案】 C【解析】【解答】14个同学去划船,租了两条船,一条船上坐了8人,另一条船上坐了:14-8=6(人).故答案为:C.【分析】根据题意可知,已知两条船上坐的总人数,用总人数-一条船上坐的人数=另一条船上坐的人数,据此列式解答.二、连线题7.送小鸟回家。

1年级下册数学人教版课时练第2单元《十几减9》(含答案)

1年级下册数学人教版课时练第2单元《十几减9》(含答案)

课时练第2单元 20以内的退位减法十几减9一、单选题1.18-9=()A.3B.4C.6D.92.13-9=()A.4B.9C.48D.803.芳芳读一本18页的故事书,读了一周正好读完它的一半,还剩()没有读。

A.8B.9C.10二、判断题4.15-9=(7 )()5.小白兔有16个萝卜,它吃了9个,还剩下6个()6.两个数的和是17,这两个数一定是9和8。

()三、填空题7.填一填________、________、________、________、________。

8.填“>”、“<”或“=”。

13-9________715-9________414-9________518-9________14-917-9________12-916-9________10-99.在横线上填上“>”“<”或“=”15-8 ________15-714-7 ________13-811-8 ________17-716-8 ________19-9 18-9 ________14-918-8 ________17-910.算一算,填一填.(从上到下填写)四、应用题11.看图列式.________+ ________= ________ ________ - ________= ________五、解答题12.看图填算式。

13.看图列式计算。

一、单选题1. D2. A3. B二、判断题4. 错误5. 错误6. 错误三、填空题7. 12;-;9;=;38. <;>;=;>;>;>9. <;>;<;<;>;>10. 8;14;7四、应用题11.9+5=1414-9=5(或14-5=9)五、解答题12. 9+5=14,5+9=14,14-5=9,14-9=5。

13. 13-9=4第2单元 20以内的退位减法十几减9一、选择题1.小云做了13朵纸花,小梅做了9朵,小梅至少要做几朵,才能超过小云?()A.4朵B.5朵C.6朵2.在9+□<15中,□中可以填()。

2021年人教版一年级数学下册期末口算练习题及答案16套

2021年人教版一年级数学下册期末口算练习题及答案16套

练习一十几减 91.口算。

15-9= 11-9= 18-9= 12-9= 17-9= 13-9=14-9= 16-9= 19-9=2.算一算。

11-9+3= 12-9-3= 8+9-9=14-9+7= 13-9+8= 17-9-4=5+7-9= 6+8-9= 16-9+2=7+7-9= 9+2-9= 14-2-9=15-9+3= 5+8-9= 8+7-9=3.蜜蜂采蜜。

4.在○里填上“>”“<”或“=”。

11-9○4 12-9○3 15-9○714-9○5 13-9○3 17-9○65+7-9○36+8-9○106+9-9○9 11-9○15-913-9○14-9 17-9○12-910比9多1,用“破十法”计算十几减9,可以用“几加1”直接求出结果。

一个算式里有加法和减法要按照从左到右的顺序进行计算。

先算出各算式的得数,再把算式和得数连起来。

你发现差是怎样随着被减数的变化而变化的呢?先算出各算式的结果,再比较结果的大小。

有的不需要计算就可以知道答案,你发现了吗?练习二十几减8、7、6 1.口算。

11-7= 15-7= 16-8=12-6= 14-7= 14-6=15-8= 12-8= 11-6=13-6= 13-7= 10-6=2.连一连。

3.在○里填上“>”“<”或“=”。

11-8○6 12-7○6 15-7○7 14-7○7 13-6○7 16-8○1012-6○5 14-6○8 15-6○914-8○9 11-7○5 13-8○811-6○11-7 13-7○13-6 15-6○15-74.算一算。

11-7+3= 12-8+5= 8+5-6=14-6+7= 13-6+3= 16-7-4=5+7-6= 6+8-6= 15-7+6=7+8-7= 9+2-7= 14-8-2=12-8+3= 5+8-7= 9+3-7=可以用“破十法”“平十法”和“想加算减法”几种方法来计算十几减8、7和6。

一年级数学下册:重点知识归纳+易错题梳理

一年级数学下册:重点知识归纳+易错题梳理

人教版一年级数学下册期末总复习第一部分 20以内的退位减法主要内容:一、计算1.十几减92.十几减8、73.十几减6、5、4、3、2计算方法:例:13-9(1)平十法先算13-3=10,再算10-6=4;(2)破十法先算10-9=1,再算1+3=4;(3)想加算减★因为(4)+ 9=13,所以13-9=4。

二、解决问题1.从一个数中去掉一部分,求剩余的实际问题,用减法。

(一上已经学过)如:原来有14份报纸,卖了8份,还剩多少份?2.已知两个部分数,求总数的实际问题,用加法。

(一上已经学过)如:桃树有9棵,梨树有8棵,桃树和梨树一共有多少棵?3.从总数中去掉其中的一部分,求另一部分的实际问题,用减法。

如:一共有13个气球,其中花气球有8个,白气球有多少个?易错题:1.在()里填合适的数。

14-()=5 12-9=()-1016-8=2+() 11-()=9-()2.()里最大能填几。

9+()<15 8+() <18()-9 < 2 12-()> 33.树上原来有15只小鸟,第一次飞走了6只,第二次飞走了4只。

(1)两次一共飞走了多少只小鸟?(2)现在树上还剩多少只小鸟?4.饲养场里有16只牛,8只羊,9只兔。

(1)羊和兔一共有多少只?(2)母牛有9只,公牛有多少只?5. 教室里原有14个小朋友,第一次走了一些小朋友,第二次又走了一些小朋友,现在教室里还剩5个小朋友,两次一共走了几个小朋友?6.第二部分认识图形主要内容:一、认识长方形、正方形、三角形和圆1.通过观察、操作等各种活动,直观认识长方形、正方形、三角形和圆,知道这些图形的名称。

2.通过画、折、摆等各种活动,初步体会长方形、正方形、三角形和圆的一些特征。

(1)长方形有两条长边和两条短边,两条长边长度相等,相对的两条短边长度相等。

(2)正方形的四条边的长度都相等。

(3)三角形有三条边。

(4)钉子板上不可能围出圆。

在钉子板上围出正方形、长方形和三角形根据要求画图形1.利用物体画图形。

十几减几退位减法口速算

十几减几退位减法口速算

十几减几口速算
方法:先想减数与几凑十。

就用几加被减数的个位。

第一步:看九想一,看8想2,看7想3,看6想4,看5想5,看4想6,看3想7,看4想6,看3想7,看2想8,第二步:用想出来的数加被减数的个位。

一、十几减9
方法:先想9与1凑十,就用1加被减数的个数。

例如:15-9=,9与1凑十,就用1+5=6
16-9=,9与1凑十,就用1+6=7
二、十几减8
方法:先想8与2凑十,就用2加被减数的个数。

例如:17-8=,8与2凑十,就用2+7=9
15-8=,8与2凑十,就用2+5=7
三、十几减7
方法:先想7与3凑十,就用3加被减数的个数。

例如:15-7=,7与3凑十,就用3+5=8
13-7=,7与3凑十,就用3+3=6
四、十几减6
方法:先想6与4凑十,就用4加被减数的个数。

例如:15-6=,6与4凑十,就用4+5=9
13-6=,6与4凑十,就用4+3=7
五、十几减5
方法:先想5与5凑十,就用5加被减数的个数。

例如:11-5=,5与5凑十,就用5+1=6
13-5=,5与5凑十,就用5+3=8
六、十几减4
方法:先想4与6凑十,就用6加被减数的个数。

例如:11-4=,4与6凑十,就用6+1=7
13-4=,4与6凑十,就用6+3=9
七、十几减3
方法:先想3与7凑十,就用7加被减数的个数。

例如:11-3=,3与7凑十,就用7+1=8
12-3=,3与7凑十,就用7+2=9
八、十几减2
方法:先想2与8凑十,就用8加被减数的个数。

例如:11-2=,2与8凑十,8+1=9。

人教版 小学数学一年级下册2 20以内的退位减法十几减9习题(4)

人教版 小学数学一年级下册2 20以内的退位减法十几减9习题(4)

20以内的退位减法十几减9(1)一、直接写出得数。

10+7= 9+6= 5+9= 8+4=9+4= 2+9= 7+6= 9+8=16-4= 10-9= 10-4= 10-3=二、算一算。

9+2= 9+5= 9+8= 9+7=11-9= 14-9= 17-9= 16-9=三、用你喜欢的方法计算。

12-9= 18-9= 14-9= 11-9=16-9= 15-9= 13-9= 17-9=8+8= 3+9= 7+7= 9+6=6+8= 5+6= 6+7= 8+5=四、在○里填上>、<或=。

14-9○4 9+7○17 12-9○517○9+8 15-9○6 9○17-9五、解决问题。

共有18本书,发给同学9本,还剩下几本?十几减9(2)一、直接写出得数。

9+6= 13+5= 6+7= 8+9=10+7= 16-4= 9+2= 17-3=8-4= 19-7= 18-10= 4+5=二、算一算。

6+9= 9+8= 3+9= 9+9=12-9= 17-9= 14-9= 16-9=三、填数。

9+()=14 ()+9=16 9+()=1814-9=()15-9=()18-9=()四、填一填。

1、16的个位是(),表示()个();“1”在()位上,表示()个()。

2、长成一个大正方体至少需要()个。

3、15里面有()个十和()个一;20里面有()个十。

五、解决问题。

今天我要做14道题,已经做好9道,还要做几道?十几减8一、直接写出得数。

10+8= 8+6= 5+8= 8+4=8+4= 2+8= 7+6= 8+8=16-4= 10-8= 10-4= 10-3=二、算一算。

8+2= 8+5= 8+8= 8+7=11-8= 14-8= 17-8= 16-8=四、用你喜欢的方法计算。

12-9= 18-8= 14-8= 11-8=16-8= 15-8= 13-8= 12-8=9+8= 3+8= 7+8= 8+6=6+9= 5+6= 6+7= 8+5=五、在○里填上“>”、“<”或“=”。

【教案】人教版小学数学:一年级下册第二单元《20以内的退位减法》

【教案】人教版小学数学:一年级下册第二单元《20以内的退位减法》

【教案】⼈教版⼩学数学:⼀年级下册第⼆单元《20以内的退位减法》[⼈教版⼩学数学⼀年级下册教科书:]学习顺序:⼗⼏减9➡⼗⼏减8、7、6➡⼗⼏减5、4、3、2➡列式、运⽤减法进⾏解决实际问题➡整理和复习⼀、⼗⼏减91、⾸先的导⼊题是“游乐园⾥,⼩丑有15个⽓球,卖给了9个,还有⼏个?“列式”15-9=()“。

【解读】为什么从减9⼊⼿呢?是因为学⽣可以借助整⼗来帮助解题。

9加1等于10对于学⽣是⽐较简单的。

⽅法⼀:【解读】15分成10和5,学⽣可以先⽤简单的10减9,减的结果1再加上剩下的5求得最终结果。

这就是⽅法⼀。

⽅法⼆:【解读】主要是借助加法解题。

先运⽤加法找出9与什么加数相加得15,再反过来求得差。

2、然后⽤⼩棒摆⼀摆算⼀算”11-9=,16-9=”,⽤圈⼀圈算⼀算“14-9=,17-9=“【解读】通过具体的⽅法”数⼩棒,圈图案“,直观感受减法的的变化过程。

3、接着⽤⾃⼰喜欢的⽅法计算“13-9,12-9,19-9,18-9”【解读】上⾯使⽤了四种⽅法,整⼗法,加法,数⼩棒,圈画图案。

学⽣在进⾏选择的时候会思考每种⽅法怎么使⽤,然后再⼀次体验减法的过程。

并且⾄此,学⽣已经把19~11的9的减法都算了⼀遍。

4、最后是练习题【解读】这道题运⽤加法。

【解读】题⽬趣味化,学⽣不断练习减法,使⽤的⽅法不定,学⽣算多了就对哪种⽅法简单更有感觉。

【解读】训练19~10减9,但是不是按顺序的,应该是避免学⽣固化:答案按顺序加1或者减1。

【解读】加⼊⼝的训练,使学⽣运⽤⼝、⼿综合使⽤,配合运算。

【解读】混进了“15-5,18-10,17-4,16-2”,应该是先体验⼀下减数不为9的减法。

但是都是可以⽤整⼗法进⾏计算的。

如15-5就不是分离的10减5⽽是分离的5减5。

所以这道题即时以上减法训练的综合,也是算法的⼀个灵巧变题,还是体验了减数为其他数的机会。

【解读】把减法运⽤到实际问题的解决中。

不过这道题是加法不是减法。

北师大版一年级数学下册1-4单元知识梳理+单元检测卷(含答案)

北师大版一年级数学下册1-4单元知识梳理+单元检测卷(含答案)

北师大版一年级数学下册1-4单元知识梳理+单元检测卷(含答案)第一单元知识梳理十几减9,8,7,6等的退位减法1. 计算十几减9,8,7,6等的退位减法,可以用“破十法”“平十法”“想加算减法”等方法计算2. 看图列式,已知总数和去掉的一部分,求还剩下多少,用减法计算解决多多少、少多少的问题小鸟有12只,小猴有5只,小鸟比小猴多几只? 12-5=7(只) 比较两种物体的个数,求一种比另一种多多少或少多少,用减法计算根据情境提出数学问题并解决问题 笼子里有7只白兔,6只灰兔,提出数学问题并解答。

笼子里一共有多少只兔子?7+6=13(只)1. 能准确地收集情境中的数学信息,提出恰当的数学问题2. 能依据加法和减法的含义,正确列式计算,解决相关的实际问题20以内退位减法表中的规律 10-4=6 11-5=612-6=6 13-7=614-8=6 15-9=6掌握20以内退位减法表中的规律第一单元检测卷 加与减(一)一、填空题 1.按规律填数。

( )4 6 8 ( ) ( ) ( )1247( )( )( )2.14比9多( ),5比12少( )。

3.猜灯谜,填一填。

+9=13 8+=15 2+=8+7=12-4=11 16-=6 16-=13 -7=74.15比7大( ),2比11小( )。

5.比8多8的数是( ),和它相邻的数是( )和( )。

二、选择题1.用9、13、4写出减法算式,不正确的是()。

A.13-4=9 B.13-9=4 C.9-4=52.下面算式()的得数与14-5相同。

A.15-8 B.4+5 C.11-33.11-7=()。

A.4 B.6 C.7 D.214.停车场原来有15辆汽车,现在只有6辆,开走了()辆。

A.9 B.10 C.145.草地上的白羊和黑羊一共有12只,白羊有7只,黑羊有()A.12+7=19(只) B.12-7=5(只)C.12+7=5(只)D.12-7=6(只)6.停车场原来停了14辆汽车,后来开走了7辆,停车场现在停了()辆。

人教版一年级数学下册期末 十几减9、8、7、6的计算方法专项试卷附答案

人教版一年级数学下册期末 十几减9、8、7、6的计算方法专项试卷附答案

(2)男生有6人,女生有几人?(10分)
13 - 6 = 7 ( 人 ) 点拨:这两个小题中的总人数都是13,把总人数分成了男生 和女生两部分。两个小题都可以利用“总量-一部分量=另 一部分量”这个数量关系列出相应算式。
三 看图列式计算。(每式4分,共12分)
1.
15 - 8 = 7 (个) 点拨:苹果总数减去右边的苹果数量,就是袋子里的苹果 数量。
2.
16 - 7 = 9 (只) 16 - 9 = 7 (只) 点拨:图中的总量被分为两部分,利用“总量-一部分量= 另一部分量”可以写出两道不同的减法算式。
四 聪明的你,答一答。(共29分)

3.在 里填上“>”“<”或“=”。
11-9 = 2
13-8 < 11
14-6 > 7
11-7 > 3
16-9 > 5
15-6 < 10
二 细心的你,算一算。(共35分)
1.看谁算得又对又快。(每小题1分,共9分) 12-9=3 13-7=6 8+6=14 11-8=3 14-9=5 15-7=8 9+7=16 16-8=8 17-9=8 点拨:计算十几减9、8、7、6时,可用“破十法”,把十几 分成10和几,先用10去减,所得的差再加上十几中的“几”, 得到的就是最终结果。
1.讲伟人故事,悟民族脊梁。一(3)班开展“讲伟人的故事”主 题班会。还有几名同学没有上台讲故事?(9分)
14 - 9 = 5 ( 名 ) 点拨:讲故事的同学总人数减去讲完的同学人数,得到的就 是没上台讲故事的同学人数。
2.一共有13个小朋友。
(1)跳绳的有8人,踢毽子的有几人?(10分) 13 - 8 = 5 ( 人 ) 点拨:这两个小题中的总人数都是13,把总人数分成了跳绳 的和踢毽子的两部分,

人教版一年级下册数学第3周(十几减9、8、7、6)作业单

人教版一年级下册数学第3周(十几减9、8、7、6)作业单

人教版一年级下册数学第3周(十几减9、8、7、6)作业单
班级:_________ 姓名:__________
1.看谁算得又对又快。

7+6= 11-7= 16-9= 12-7=
19-9= 13-6= 17-9= 5+7=
12-8= 15-8= 14-8= 17-8=
2.“16-9”可以怎样算呢?我有不同的想方法。

3.在⚪里填上“>”“<”或“=”。

13-7⚪12-6 14-8⚪12-8 15-9⚪15-7
16-9⚪15-8 13-5⚪16-7 17-8⚪15-7
4.先观察每组算式,再算一算。

5.看谁算得又对又快。

6+5-9= 16-9-2= 5+7-2= 9+7-10=
10+2-9= 18-9-6= 17-9+5= 14-9+7= 把16分成10和6
10-9=1
1+()=()
把9分成3和6
16-6=10
()-3=()
9+()=16
16 - 9 =()
6.一(1)班数学学具借出情况如下:
学具七巧板计数器小棒
原有12套11个15捆
借出6套()个8捆
还剩()套7个()捆
7.芳芳每天喝一盒牛奶,喝了一个星期,还剩多少盒?
= ()
8.王阿姨一共要包15个汤圆,已经包好了7个,还要包几个?
= ()
9.一共有15只天鹅。

(1)白天鹅6只,黑天鹅几只?
= (只)
(2)左边7只,右边几只?
= (只)
9.有9名女生围成一圈做游戏,如果相邻2名女生之间各站1名男生,那么一共可以站()名男生。

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