20以内的进位加法
20以内进位加减法
20以内进位加减法20以内进位加法:方法一:“凑十法”(强调:看大数,分小数,凑成十,加剩数)8+5=8+2+3=13;方法二:“五五凑十”( 当两个加数都大于且接近5时适用) 6+7=5+5+1+2=13;方法三:“多加减补”8+5=10+5-2=13.20以内进位加法“凑十法”、“凑小数,拆大数”,将小数凑成10,然后再计算。
如: 3+9 (3+7=10,9可以分成7和2,10+2=12)凑大数,拆小数”,将大数凑成10,然后再计算。
如: 8+7 (8+2=10,7可以分成2和5,10+5=15)整数加法计算法则:相同数位对齐,从低位加起,哪-一位上的数相加满十,就向前一位进一。
整数减法计算法则:相同数位对齐,从低位加起,哪一位上的数不够减,就从它的前一位退一作十,和本位上的数合并在一起,再减。
例题加减混合运算2+6+2= 5+3+2= 4+0+3= 10—3—7= 9—3—6= 10—1—4= 7—2+4= 8+2—6= 10—4+3= 3+6—8= 一、10以内的加减法0+6=0+0=1+2=1+9=10-8=2+3=2+8=4--3=3+6=5-1=6-4=4+6=9-0=5+5=6+2=7+2=7+3=8+1=9-2=9-7=8-1=8-5=8-7=7-3=7-5=3+1=5-4=3+3=3-1=4+4=二、求未知加数2+()=10 4+()=8 5+()=109+()=9 3+()=7 ()+6=10 ()+3=9 ()+1=10 ()+7=10 ()+9=10三、连加17-10= 16-1= 16-2= 16-3= 16-4=1+11= 1+12= 1+13= 1+14= 1+15=20-10= 19-1= 19-2= 19-3= 19-4=18-5= 18-6= 18-7= 18-8= 18-9=17-5= 17-6= 17-7= 17-8= 17-9=6-2= 6-3= 6-4= 6-5= 6-6=16-10= 15-1= 15-2= 15-3= 15-4=15-10= 14-1= 14-2= 14-3= 14-4= 1+16= 1+17= 1+18= 1+19= 2+0= 19-5= 19-6= 19-7= 19-8= 19-9=2+12= 2+13= 2+14= 2+15= 2+16= 15-5= 15-6= 15-7= 15-8= 15-9= 18-10= 17-1= 17-2= 17-3= 17-4= 2+17= 2+18= 3+3= 3+4= 3+5= 19-10= 18-1= 18-2= 18-3= 18-4= 3+16= 3+17= 4+4= 4+5= 4+6=13-5= 13-6= 13-7= 13-8= 13-9=13-10= 12-1= 12-2= 12-4= 12-5= 4+12= 4+13= 4+14= 4+15= 4+16= 11-1= 11-2= 11-3= 11-4= 11-5=5+5= 5+6= 5+7= 5+8= 5+9=8-7= 8-8= 7-1= 7-2= 7-3=。
20内进位加法表口诀
20内进位加法表口诀
20以内进位加法口诀是帮助小朋友记忆20以内进位加法的方法。
该口诀是根据进位加法的规则编写的,可以帮助小朋友理解进位加法的概念。
20以内进位加法口诀
●个位加位,不进不退
●十位加位,个位进一
●百位加位,十位进一,个位进二
口诀解释
●个位加位,不进不退:两个个位数相加,如果和小于10,则个位不进位,十位也不进
位。
例如,5+2=7,个位不进位,十位也不进位。
●十位加位,个位进一:两个十位数相加,如果和小于20,则个位进一,十位不进位。
例如,10+10=20,个位进一,十位不进位。
●百位加位,十位进一,个位进二:两个百位数相加,如果和小于100,则十位进一,个
位进二。
例如,100+100=200,十位进一,个位进二。
口诀示例
1.1+2=3
2.5+6=11
3.10+11=21
4.100+101=201
口诀练习
●5+3=?
●11+6=?
●100+100=?
●200+201=?
小朋友可以通过朗诵口诀来记忆20以内进位加法。
也可以通过练习一些加法题来巩固记忆。
20以内进位加法解读
20以内进位加法解读一、引言进位加法是我们日常生活中经常使用的一种加法运算方法。
本文将详细介绍20以内的进位加法,并解读其中的原理和应用。
二、什么是进位加法?进位加法是指在两个或多个数相加的过程中,当相加的两位数(或更多位数)的和大于等于进制规定的进位值时,需要将进位值加到前一位上,并将当前位的和取余(模)进制规定的数,形成新的位数的加法运算。
在20进制下,当相加的两位数之和大于等于20时,需要进行进位操作。
三、进位加法的原理进位加法的原理可以通过以下步骤来理解:1.从最低位开始,将相应位的数相加。
2.如果和小于20,则直接写下该和,并进入下一位数相加。
3.如果和大于等于20,则需要进行进位操作:将该位的和减去20,并记录进位值为1。
4.将进位值加到前一位数上,并继续下一位数相加。
5.重复以上步骤,直至所有位数相加完毕。
四、进位加法的计算步骤示例下面通过一个具体的例子来演示20以内的进位加法的计算步骤:假设我们需要计算以下两个数的和:13+81.从最低位开始相加:3+8=11。
2.由于和大于等于20,需要进行进位操作:11-20=11(本位的和减去20),并记录进位值为1。
3.进位值1加到前一位数上:1+1=2(十位的和)。
4.最终结果为2(十位的和)1(个位的和),即21。
五、进位加法的应用场景进位加法广泛应用于日常生活中。
以下是一些常见的应用场景:1.购物结算:当我们购买多件商品时,需要将每件商品的价格相加,进位加法可用于计算总价格。
2.时间计算:当我们计算时间差或者时间相加时,可以使用进位加法来处理小时、分钟和秒的进位情况。
3.学习成绩计算:当我们计算多门学科的成绩总和时,进位加法可用于计算总分数。
通过以上几个应用场景的解读,可以看出进位加法在我们生活中的普遍性和重要性。
六、总结进位加法是一种常用的加法运算方法,尤其在20以内的计算中更加常见。
本文介绍了进位加法的原理、计算步骤示例以及几个常见的应用场景。
20以内进位加法100题(30套)
姓名: 时间: 成绩:创作编号:GB8878185555334563BT9125XW创作者: 凤呜大王*8+8=7+9=7+8=6+7=6+7=7+5=7+7=8+8=2+9=7+7= 4+7= 3+9= 6+6= 6+8= 8+3=9+3=3+8=9+2=2+9=8+8=4+9=9+8=7+9=7+7=9+9= 8+8=4+8= 8+5= 9+5= 8+5= 6+5= 7+7= 9+5= 3+8= 8+4= 9+6= 4+9= 8+4= 5+7=6+7= 8+9= 9+2=6+9=9+9= 6+6= 9+9=7+7= 3+8= 9+2= 6+5= 7+9= 2+9= 7+7= 4+8= 8+3= 8+6=作编号:GB8878185555334563BT9125XW作者: 凤呜大王*6+7= 5+6= 5+6= 8+5= 6+5= 9+6= 4+8=姓名:时间:成绩:7+7=9+5=7+8=7+5=9+9=5+7=8+4=8+4=9+3=9+6=4+8=8+5=7+8=9+7=3+8=4+8=9+2=3+9=4+7=9+4=7+9=9+2=4+9=4+8=7+9=9+8=6+8=5+7=4+7=9+7=8+3=7+4=5+6=9+9=7+9=3+8=8+5=8+3=9+9=9+9=9+7=3+8=9+2=7+5=4+8=4+7=5+9=4+8=8+6=6+6=5+9=6+8=4+9=9+9=6+5=8+4=9+4=3+9=5+8=作编号:GB8878185555334563BT9125XW作者:凤呜大王*5+9=9+2=7+6=7+5=8+3=9+9=5+7=6+7=6+6=8+4=姓名:时间:成绩:5+8=3+8=6+6=6+6=7+6=2+9=7+6=5+7=6+8=8+8=6+7=6+7=2+9=6+8=8+4=8+4=7+9=2+9=6+9=6+9=7+7=7+8=9+8=8+4=6+5=9+3=9+2=6+7=8+9=9+8=4+8=9+9=7+9=5+7=8+3=9+2=8+6=9+2=7+7=8+7=3+9=7+6=9+6=8+9=5+7=8+9=9+7=8+6=7+5=7+7=2+9=9+7=4+8=8+5=5+8=9+7=6+5=6+9=6+9=8+7=9+6=9+4=6+9=4+7=3+9=5+7=作编号:GB8878185555334563BT9125XW作者:凤呜大王*7+8=7+9=9+2=姓名:时间:成绩:9+5=9+8=2+9=4+7=9+9=4+9=8+8=8+7=8+6=8+7=8+7=9+9=6+6=7+4=9+3=3+9=9+3=9+5=6+8=7+6=6+9=8+3=6+5=8+3=8+4=4+7=7+6=5+8=8+8=7+5=7+9=3+8=8+6=8+5=9+6=6+6=5+9=7+6=7+8=9+8=8+3=7+4=8+4=6+5=8+4=6+5=6+8=4+9=3+8=4+7=8+7=9+9=6+5=7+9=4+8=9+2=5+9=6+6=3+8=9+6=9+8=6+9=3+8=9+7=5+7=9+3=9+6=7+9=9+9=8+5=7+5=9+2=6+6=6+8=7+8=姓名: 时间: 成绩:3+9= 5+6= 9+7= 2+9= 6+7= 7+8= 9+8= 7+9=创作编号:GB8878185555334563BT9125XW创作者: 凤呜大王*9+2= 8+9= 4+7= 5+6= 9+2= 7+4= 7+5= 5+7= 3+8= 7+6= 9+7= 9+2= 5+9= 8+5= 7+7=6+7= 5+6= 3+8= 6+5= 2+9= 5+8= 4+8= 8+3= 2+9= 6+6= 6+9= 6+7= 8+7=6+5= 5+6= 9+8=9+2= 8+8= 2+9= 7+9= 4+7= 9+2= 8+5= 3+8= 8+9= 8+7= 8+5= 7+4= 5+9=8+4= 5+9=6+6= 5+7= 8+9= 4+7= 8+5= 9+2= 8+7= 7+9= 6+8= 4+8= 7+4= 6+6= 3+9= 5+6= 9+7=姓名:时间:成绩:8+4=6+5=6+5=9+5=9+8=8+3=8+3=9+6=7+9=7+5=6+8=7+7=8+4=9+2=3+8=5+8=8+7=6+6=8+9=8+6=7+4=5+9=9+2=9+4=6+6=5+6=6+7=9+3=3+9=5+7=9+2=6+6=3+9=9+3=8+7=创作编号:GB8878185555334563BT9125XW创作者:凤呜大王*7+8=3+8=8+5=8+8=5+8=8+5=5+7=9+9=9+3=8+3=6+9=9+9=5+6=7+5=6+6=3+8=3+8=8+7=6+6=6+7=5+8=8+3=3+8=5+7=7+7=9+5=4+8=9+7=9+4=8+6=4+7=6+8=8+8=9+9=姓名:时间:成绩:9+9=8+5=9+7=6+9=8+6=3+8=8+3=5+7=9+3=4+8=8+6=8+9=8+9=8+3=9+8=8+5=4+8=4+8=7+8=6+7=6+5=9+8=8+4=4+7=8+4=7+7=9+4=3+8=7+8=9+6=6+8=7+8=4+8=8+9=6+5=9+9=4+9=2+9=8+4=9+6=5+8=8+9=7+7=7+5=9+7=4+8=5+8=6+8=7+9=4+9=9+3=2+9=5+6=8+4=9+9=6+7=9+2=5+7=9+7=6+6=8+4=9+6=7+4=6+9=6+9=9+2=3+8=7+5=2+9=8+7=7+8=6+8=作编号:GB887818555姓名: 时间: 成绩:5334563BT9125XW创作者: 凤呜大王*6+9= 7+8= 9+5= 9+4= 5+8= 3+9= 8+4= 8+9= 7+8= 9+8= 8+8= 9+5=7+5= 8+4= 8+4=5+8= 6+5= 8+9= 9+4= 3+9= 8+8= 8+5= 8+5= 4+7= 7+8= 9+9= 7+5=9+2= 8+4= 5+8= 9+2= 8+3= 3+8= 6+7= 4+8= 4+8= 4+8= 9+8= 9+2= 8+6= 3+8= 9+7=6+9= 7+6= 8+9= 5+7= 6+7= 9+2= 3+8= 9+9= 3+9= 6+5= 7+8= 3+8= 7+4= 6+7= 3+9=8+9= 9+7= 4+8= 7+9= 9+5= 9+8= 8+7= 8+9= 7+9= 4+9= 7+6= 9+8= 6+7= 4+9= 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一年级数学20以内的进位加法(共30张)01
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+ 8 = 6 + 9 = 9 + 4 = 2 + 8 = 4 + 7 = 4 + 8 = 9 + 9 = 1 + 9 = 5 + 7 = 6 + 9 = 6 + 5 = 1 + 9 = 3 + 9 = 4 + 6 = 4 + 9 = 4 + 8 = 8 + 2 = 9 + 2 = 3 + 7 = 5 + 6 = 9 + 1 = 8 + 3 = 6 + 9 = 8 + 3 = 5 + 6 = 7 + 6 = 7 + 3 = 9 + 9 = 9 + 1 = 6 + 7 =题数:50 共:100分分秒成绩:8 + 4 = 6 + 8 = 5 + 8 = 9 + 3 = 7 + 6 = 8 + 7 = 5 + 7 = 8 + 4 = 7 + 5 = 6 + 6 = 8 + 7 = 9 + 5 = 4 + 7 = 5 + 5 = 5 + 6 = 4 + 9 = 8 + 9 = 6 + 8 = 7 + 6 = 4 + 7 =7 + 9 = 5 + 5 = 4 + 9 = 6 + 5 = 8 + 4 =8 + 9 = 6 + 9 = 8 + 3 = 8 + 2 = 9 + 1 = 7 + 5 = 5 + 5 = 5 + 8 = 3 + 9 = 4 + 8 = 4 + 6 = 8 + 6 = 7 + 4 = 6 + 7 = 5 + 9 =8 + 2 = 3 + 7 = 3 + 9 = 6 + 6 = 5 + 5 =9 + 5 = 9 + 9 = 5 + 5 = 6 + 5 = 8 + 7 =题数:50 共:100分分秒成绩:5 + 8 = 8 + 3 =6 +7 = 1 + 9 = 9 + 6 = 9 +8 = 7 + 6 = 7 + 4 =9 + 3 = 5 + 5 = 4 + 9 = 6 + 8 = 7 + 3 = 8 + 7 = 7 + 8 = 9 + 5 = 8 + 7 = 2 + 9 = 8 + 9 = 7 + 7 = 7 + 8 = 8 + 3 = 8 + 6 = 4 + 9 = 9 + 3 = 7 + 8 = 9 + 3 = 7 + 8 = 9 + 9 = 4 + 8 = 2 + 8 = 7 + 8 = 6 + 7 = 8 + 5 = 6 + 6 = 9 + 4 = 5 + 6 = 4 + 9 = 3 + 9 = 9 + 1 = 6 + 7 = 4 + 6 = 7 + 8 = 6 + 9 = 9 + 8 = 6 + 9 = 1 + 9 = 4 + 8 = 6 + 4 = 5 + 6 =题数:50 共:100分分秒成绩:7 + 3 = 6 + 6 = 5 + 9 = 5 + 6 = 6 + 8 = 9 + 6 = 9 + 2 = 9 + 9 = 7 + 9 = 7 + 7 = 6 + 9 = 8 + 6 = 8 + 5 = 7 + 5 = 5 + 7 = 9 + 6 = 9 + 5 = 9 + 7 = 8 + 8 = 5 + 9 =4 + 8 = 7 + 7 = 8 + 9 = 9 + 4 = 8 +5 =5 + 8 = 7 + 7 = 7 + 5 = 1 + 9 = 7 + 9 =6 + 8 = 6 + 4 = 3 +7 = 5 + 9 = 4 + 9 = 6 + 6 = 4 + 7 = 9 + 9 = 9 + 4 = 9 + 2 = 5 + 7 = 6 + 7 = 9 + 5 = 7 +8 =9 + 6 = 7 + 3 = 9 + 1 = 8 + 6 = 9 + 8 = 4 + 9 =题数:50 共:100分分秒成绩:9 + 2 = 5 + 8 = 6 + 6 = 6 + 5 = 8 + 2 = 8 + 6 = 8 + 8 = 5 + 5 = 9 + 4 = 6 + 8 = 7 + 6 = 8 + 4 = 7 + 9 = 9 + 3 = 5 + 7 = 7 + 8 = 6 + 8 = 7 + 4 = 1 + 9 = 8 + 8 = 3 + 8 = 3 + 7 = 7 + 4 = 5 + 9 = 7 + 4 =7 + 8 = 5 + 7 = 6 + 8 = 5 + 5 = 9 + 3 =8 + 6 = 7 + 7 = 9 + 3 = 5 + 5 = 6 + 5 = 3 + 7 = 7 + 3 = 5 + 8 = 9 + 5 = 7 + 9 = 1 + 9 = 8 + 2 = 9 + 2 = 3 + 7 = 4 + 7 = 8 + 8 = 9 + 7 = 7 + 3 = 7 + 3 = 9 + 7 =题数:50 共:100分分秒成绩:3 + 9 = 9 + 5 = 7 + 9 = 9 +4 = 3 + 7 =4 + 9 = 2 + 9 = 7 +5 = 5 + 9 = 7 + 5 = 9 + 7 = 9 + 1 =6 + 8 = 2 + 8 = 8 + 6 =7 + 9 = 7 + 6 =8 + 5 = 5 + 5 = 2 +9 =6 + 8 = 6 + 4 = 6 + 9 = 9 + 9 =7 + 6 =7 + 3 = 2 + 9 = 6 + 9 = 7 + 3 = 4 + 6 = 9 + 7 = 8 + 6 = 6 + 8 = 7 + 5 = 8 + 3 = 8 + 4 = 6 + 6 = 5 + 6 = 8 + 5 = 7 + 7 = 8 + 5 = 9 + 5 = 9 + 4 = 9 + 9 = 5 + 7 = 6 + 7 = 7 + 8 = 8 + 8 = 9 + 2 = 8 + 4 =题数:50 共:100分分秒成绩:8 + 9 = 4 + 8 = 7 + 3 = 7 + 6 = 8 + 5 = 4 + 7 = 1 + 9 = 9 + 6 = 8 + 3 = 5 + 5 = 3 + 8 = 9 + 7 = 8 + 6 = 5 + 6 = 7 + 9 = 9 + 2 = 9 + 1 = 9 + 8 = 8 + 6 = 8 + 7 = 8 + 8 = 3 + 8 = 8 + 7 = 2 + 9 = 5 + 6 = 2 + 8 = 9 + 9 = 5 + 9 = 7 + 5 = 1 + 9 =7 + 3 = 8 + 8 = 7 + 6 = 9 + 8 = 3 + 9 =8 + 7 = 7 + 8 = 6 + 7 = 8 + 4 = 6 + 6 = 7 + 5 = 8 + 6 = 9 + 1 = 8 + 9 = 6 + 6 = 4 + 6 = 3 + 8 = 6 + 7 = 7 + 8 = 6 + 8 =题数:50 共:100分分秒成绩:7 + 6 = 9 + 1 = 9 + 6 = 5 + 9 = 9 + 2 = 5 + 6 = 9 + 3 = 6 + 4 = 6 + 7 = 5 + 7 = 9 + 6 = 6 + 6 = 6 + 4 = 7 + 3 = 8 + 8 = 2 + 8 = 4 + 7 = 9 + 1 = 8 + 8 = 9 + 2 = 9 + 5 = 7 + 8 = 9 + 7 = 6 + 4 = 7 + 6 = 9 + 7 = 6 + 4 = 8 + 5 = 8 + 8 = 6 + 9 = 9 + 5 = 7 + 7 = 3 + 9 = 4 + 9 = 9 + 5 = 8 + 4 = 6 + 7 = 9 + 7 = 9 + 3 = 5 + 8 = 6 + 7 = 5 + 6 = 8 + 9 = 4 + 6 = 9 + 4 = 1 + 9 = 2 + 9 = 2 + 8 = 8 + 9 = 4 + 6 =题数:50 共:100分分秒成绩:7 + 8 = 6 + 7 = 8 + 8 = 1 + 9 = 9 + 6 = 6 + 9 = 7 + 4 = 8 + 9 = 9 + 7 = 3 + 7 = 4 + 8 = 9 + 4 = 3 + 7 = 2 + 8 = 9 + 3 = 9 + 7 = 9 + 9 = 8 + 2 = 1 + 9 = 7 + 9 = 6 + 6 = 9 + 2 = 5 + 5 = 6 + 8 = 7 + 7 = 6 + 7 = 7 + 8 = 5 + 5 = 9 + 3 = 7 + 5 = 5 + 8 = 9 + 5 = 8 + 2 = 3 + 9 = 8 + 6 = 3 + 8 = 9 + 5 = 7 + 9 = 9 + 7 = 4 + 8 = 7 + 9 = 9 + 6 = 2 + 8 = 3 + 7 = 9 + 7 = 7 + 9 = 7 + 4 = 6 + 6 = 5 + 7 = 7 + 6 =题数:50 共:100分分秒成绩:5 +6 = 9 + 3 = 9 +7 = 6 + 6 = 4 + 9 =8 + 8 = 6 + 7 = 7 + 3 = 5 +9 = 6 + 9 = 8 + 9 = 8 + 6 = 9 + 9 = 7 + 4 = 8 + 7 = 7 + 6 = 9 + 8 = 5 + 9 = 7 + 3 = 3 + 7 = 3 + 9 = 6 + 4 = 3 + 7 = 3 + 8 = 8 + 5 = 3 + 8 = 6 + 8 = 5 + 7 = 4 + 9 = 3 + 9 = 6 + 4 = 8 + 9 = 4 + 8 = 5 + 8 = 8 + 9 = 5 + 7 = 7 + 6 = 8 + 3 = 2 + 9 = 8 + 7 = 4 + 8 = 3 + 7 = 8 + 3 = 8 + 5 = 7 + 7 = 3 + 8 = 5 + 8 = 6 + 5 = 4 + 9 = 7 + 3 =题数:50 共:100分分秒成绩:9 + 7 = 9 + 4 = 6 + 5 = 6 + 8 = 8 + 2 = 7 + 8 = 1 + 9 = 6 + 8 = 7 + 4 = 8 + 7 = 9 + 1 = 9 + 8 = 5 + 5 = 2 + 9 = 5 + 8 = 6 + 4 = 5 + 5 = 4 + 7 = 6 + 8 = 6 + 6 = 8 + 2 = 7 + 4 = 8 + 5 = 9 + 4 = 8 + 9 = 8 + 8 = 5 + 5 = 9 + 6 = 8 + 5 = 9 + 6 = 6 + 9 = 7 + 5 = 4 + 6 = 9 + 7 = 9 + 4 = 6 + 5 = 6 + 8 = 8 + 2 = 7 + 8 = 1 + 9 = 6 + 8 = 7 + 4 = 8 + 7 = 9 + 1 = 9 + 8 = 5 + 5 = 2 + 9 = 5 + 8 = 6 + 4 = 5 + 5 =题数:50 共:100分分秒成绩:9 + 3 = 8 + 6 = 1 + 9 = 5 + 6 = 7 + 5 =8 + 5 = 8 + 9 = 5 + 7 = 6 + 4 = 5 + 9 =9 + 2 = 6 + 4 = 9 + 2 = 7 + 7 = 9 + 1 = 4 + 9 = 5 + 6 = 6 + 7 = 7 + 9 = 3 + 8 = 8 + 3 = 7 + 9 = 8 + 7 = 9 + 1 = 8 + 3 = 5 + 7 = 7 + 4 = 5 + 8 = 3 + 7 = 9 + 5 = 5 + 8 = 3 + 8 = 7 + 6 = 9 + 3 = 8 + 6 = 1 + 9 = 5 + 6 = 7 + 5 = 8 + 5 = 8 + 9 = 5 + 7 = 6 + 4 = 5 + 9 = 9 + 2 = 6 + 4 = 9 + 2 = 7 + 7 = 9 + 1 = 4 + 9 = 5 + 6 =题数:50 共:100分分秒成绩:4 + 9 =5 + 7 = 8 + 2 = 9 + 8 = 9 + 5 =6 + 5 =7 + 4 = 7 +8 =9 + 9 = 8 + 4 = 5 + 9 = 5 + 7 = 8 + 3 = 5 + 5 = 9 + 6 = 3 + 9 = 8 + 2 = 3 + 9 = 9 + 7 = 2 + 9 = 5 + 7 = 6 + 8 = 7 + 7 = 4 + 8 = 9 + 8 = 7 + 8 = 7 + 5 = 2 + 8 = 8 + 7 = 5 + 7 = 3 + 7 = 8 + 3 = 7 + 3 = 4 + 9 = 5 + 7 = 8 + 2 = 9 + 8 = 9 + 5 = 6 + 5 = 7 + 4 =7 + 8 = 9 + 9 = 8 + 4 = 5 + 9 = 5 + 7 =8 + 3 = 5 + 5 = 9 + 6 = 3 + 9 = 8 + 2 =题数:50 共:100分分秒成绩:4 + 7 = 6 + 8 = 6 + 6 = 8 + 2 = 7 + 4 =8 + 5 = 9 + 4 = 8 + 9 = 8 + 8 = 5 + 5 =9 + 6 = 8 + 5 = 9 + 6 = 6 + 9 = 7 + 5 = 9 + 4 = 9 + 8 = 7 + 3 = 7 + 8 = 7 + 6 = 9 + 8 = 5 + 6 = 7 + 6 = 5 + 5 = 6 + 6 = 6 + 9 = 5 + 8 = 8 + 3 = 8 + 7 = 8 + 4 = 9 + 9 = 7 + 6 = 9 + 9 = 5 + 9 = 9 + 9 = 4 + 7 = 6 + 4 = 4 + 8 = 3 + 7 = 6 + 5 = 9 + 2 = 8 + 8 = 9 + 6 = 6 + 4 = 7 + 7 = 8 + 4 = 7 + 8 = 9 + 6 = 3 + 9 = 5 + 5 =题数:50 共:100分分秒成绩:6 +7 = 7 + 9 = 3 +8 = 8 + 3 = 7 +9 = 8 + 7 = 9 + 1 = 8 + 3 = 5 + 7 = 7 + 4 = 5 + 8 = 3 + 7 = 9 + 5 = 5 + 8 = 8 + 3 = 4 + 9 = 5 + 7 = 9 + 6 = 8 + 9 = 8 + 5 = 2 + 8 = 5 + 5 = 6 + 7 = 9 + 8 = 7 + 5 = 4 + 7 = 6 + 9 = 9 + 5 = 3 + 9 = 4 + 7 = 6 + 6 = 6 + 9 = 9 + 3 = 9 + 2 = 8 + 5 = 8 + 2 = 5 + 9 = 5 + 8 = 7 + 8 = 8 + 4 = 6 + 5 = 8 + 5 = 8 + 2 = 2 + 8 = 5 + 6 = 6 + 9 = 1 + 9 = 9 + 3 = 7 + 6 = 8 + 5 =题数:50 共:100分分秒成绩:3 + 9 = 9 + 7 = 2 + 9 = 5 + 7 = 6 + 8 = 7 + 7 =4 + 8 = 9 + 8 = 7 + 8 = 7 +5 = 2 + 8 = 8 + 7 = 5 + 7 = 3 + 7 = 7 + 9 = 9 + 1 = 7 + 8 = 9 + 7 = 3 + 8 = 5 + 8 =6 + 6 = 5 + 8 = 3 + 9 =7 +8 = 4 + 6 =7 + 4 = 6 + 5 = 4 + 6 = 8 + 5 = 7 + 7 = 6 + 8 = 1 + 9 = 8 + 8 = 5 + 8 = 5 + 5 = 6 + 5 = 7 + 9 = 8 + 2 = 8 + 9 = 6 + 4 = 8 + 4 = 9 + 5 = 7 + 7 = 2 + 9 = 3 + 7 = 8 + 7 = 5 + 5 = 9 + 2 = 3 + 8 = 9 + 8 =题数:50 共:100分分秒成绩:7 + 9 = 5 + 9 = 6 + 6 = 7 + 4 = 3 + 7 = 6 + 8 = 4 + 6 = 8 + 7 = 2 + 8 = 5 + 7 = 5 + 9 = 7 + 5 = 9 + 4 = 5 + 6 = 6 + 9 = 9 + 1 = 9 + 5 = 8 + 6 = 5 + 9 = 4 + 8 = 6 + 7 = 7 + 8 = 9 + 3 = 5 + 6 = 6 + 6 = 8 + 2 = 5 + 8 = 5 + 6 = 4 + 9 = 5 + 9 =7 + 5 = 7 + 4 = 4 + 6 = 9 + 2 = 9 + 3 =8 + 3 = 9 + 6 = 2 + 9 = 8 + 2 = 9 + 8 = 7 + 6 = 7 + 7 = 9 + 8 = 4 + 6 = 3 + 8 = 4 + 7 = 9 + 8 = 7 + 3 = 2 + 9 = 5 + 6 =题数:50 共:100分分秒成绩:2 + 9 = 5 + 8 = 8 + 4 = 6 + 9 = 4 + 7 =3 + 7 = 7 + 3 = 5 + 8 = 9 + 6 =4 + 6 = 8 + 8 = 6 + 7 = 1 + 9 = 9 + 7 = 6 +5 = 7 + 8 =6 + 8 =7 + 7 = 6 + 6 = 9 + 3 =7 + 4 = 2 + 8 = 8 + 4 = 9 + 7 = 9 + 4 =8 + 3 = 7 + 3 = 9 + 2 = 4 + 7 = 8 + 6 =9 + 6 = 6 + 5 = 9 + 5 = 6 + 6 = 9 + 5 = 4 + 8 = 9 + 3 = 9 + 6 = 8 + 9 = 3 + 7 = 3 + 8 = 6 + 9 = 9 + 5 = 3 + 7 = 9 + 6 = 9 + 9 = 7 + 6 = 8 + 7 = 3 + 7 = 6 + 6 =题数:50 共:100分分秒成绩:7 + 8 = 6 + 7 = 3 + 9 = 9 + 5 = 7 + 7 = 9 + 7 = 8 + 5 = 6 + 9 = 9 + 9 = 8 + 4 = 9 + 1 = 8 + 3 = 5 + 9 = 2 + 8 = 9 + 6 = 6 + 9 = 6 + 4 = 9 + 2 = 3 + 8 = 9 + 6 = 9 + 9 = 8 + 9 = 9 + 4 = 5 + 7 = 7 + 3 = 6 + 7 = 4 + 7 = 8 + 9 = 1 + 9 = 6 + 4 = 9 + 9 = 2 + 8 = 6 + 4 = 8 + 7 = 3 + 7 = 7 + 9 = 6 + 9 = 6 + 8 = 5 + 5 = 9 + 5 = 9 + 1 = 9 + 6 = 9 + 9 = 9 + 7 = 6 + 9 = 5 + 5 = 5 + 9 = 5 + 6 = 7 + 8 = 8 + 4 =题数:50 共:100分分秒成绩:6 + 4 = 8 + 5 =7 +8 = 5 +9 = 9 + 3 = 5 + 6 = 9 + 2 = 4 + 9 = 7 + 9 = 6 + 4 = 8 + 2 = 8 + 8 = 5 + 5 = 1 + 9 = 7 + 6 = 6 + 4 = 6 + 8 = 9 + 7 = 9 + 5 = 8 + 9 = 8 + 5 = 7 + 8 = 8 + 9 = 8 + 6 = 3 + 7 = 4 + 7 = 6 + 9 = 9 + 3 = 8 + 5 = 3 + 9 = 7 + 3 = 2 + 8 = 6 + 5 = 9 + 9 = 7 + 9 =6 + 6 = 3 + 8 =7 +8 = 8 +9 = 3 + 7 =7 + 5 = 9 + 1 = 4 + 7 = 3 + 8 = 7 + 4 = 3 + 7 = 8 + 5 = 6 + 4 = 5 + 5 = 9 + 1 =题数:50 共:100分分秒成绩:4 + 7 = 9 + 8 =5 + 7 = 5 + 8 = 8 + 7 = 3 + 9 = 9 + 4 = 7 + 8 = 9 + 1 = 9 + 7 = 9 + 4 = 5 + 9 =6 +7 = 9 +8 = 7 + 3 = 4 +9 = 4 + 6 = 7 + 7 = 3 + 9 = 4 + 9 = 7 + 4 = 8 + 3 = 9 + 4 = 5 + 7 = 8 + 9 = 9 + 4 = 3 + 8 = 6 + 7 = 9 + 3 = 6 + 9 = 4 + 8 = 9 + 1 = 8 + 9 = 3 + 7 = 9 + 1 = 9 + 4 = 8 + 2 = 5 + 5 = 2 + 9 = 3 + 8 = 8 + 7 = 9 + 9 = 5 + 9 = 9 + 4 = 9 + 6 = 5 + 9 = 8 + 8 = 6 + 9 = 9 + 6 = 9 + 8 =题数:50 共:100分分秒成绩:7 + 5 = 4 + 7 = 8 + 6 = 8 + 2 = 6 + 9 = 7 + 8 = 6 + 7 = 8 + 7 = 4 + 7 = 3 + 9 =4 + 7 = 1 + 9 = 9 +5 = 5 + 7 =6 +7 =5 +6 = 8 + 4 = 6 + 9 = 1 + 9 = 9 + 5 = 8 + 9 = 9 + 5 = 4 + 8 = 6 + 5 = 9 + 8 = 6 + 8 = 6 + 5 = 1 + 9 = 5 + 5 = 3 + 8 = 8 + 9 = 8 + 2 = 5 + 8 = 8 + 3 = 5 +7 = 6 + 5 = 7 + 5 =8 + 8 =9 + 6 = 9 + 9 = 9 + 8 = 9 + 3 = 8 + 7 = 2 + 8 = 3 + 9 = 3 + 8 = 9 + 6 = 5 + 6 = 3 + 7 = 6 + 7 =题数:50 共:100分分秒成绩:5 + 9 = 8 + 4 = 7 +6 =7 + 7 = 2 + 9 = 1 + 9 = 9 + 4 = 9 + 5 = 7 +8 = 6 + 6 =8 + 9 = 8 + 6 = 9 + 7 = 7 + 4 = 9 + 5 =9 + 2 = 7 + 6 = 9 + 2 = 4 + 6 = 8 + 7 = 9 + 5 = 8 + 7 = 8 + 4 = 9 + 7 = 8 + 6 = 2 + 9 = 4 + 9 = 8 + 9 = 4 + 7 = 4 + 6 =6 + 6 = 5 + 8 = 5 +7 = 9 + 2 = 3 +8 =7 + 4 = 8 + 8 = 9 + 9 = 6 + 6 = 6 + 8 = 1 + 9 = 7 + 6 = 6 + 8 = 5 + 9 = 4 + 9 = 9 + 5 = 4 + 9 = 7 + 9 = 1 + 9 = 9 + 3 =题数:50 共:100分分秒成绩:4 + 9 =5 + 8 = 4 + 8 = 8 + 8 =6 + 5 = 9 +7 = 9 + 1 =8 + 8 = 8 + 2 = 5 + 8 = 4 + 6 = 5 + 7 = 2 + 8 = 8 +9 = 9 + 3 =7 + 5 = 3 + 9 = 9 + 1 = 8 + 5 = 8 + 9 =8 + 3 = 7 + 9 = 9 + 4 = 8 + 4 = 5 + 9 = 8 + 7 = 2 + 8 = 5 + 8 = 3 + 8 = 9 + 5 = 6 + 9 = 5 + 9 = 6 + 5 = 9 + 9 = 7 + 7 = 8 + 2 = 7 + 3 = 8 + 3 = 4 + 8 = 8 + 5 = 2 + 9 = 9 + 8 = 7 + 5 = 9 + 6 = 8 + 6 = 5 + 5 = 1 + 9 = 7 + 8 = 6 + 5 = 7 + 6 =题数:50 共:100分分秒成绩:8 + 6 = 9 + 5 = 7 + 3 = 7 + 8 = 9 + 9 = 7 + 9 = 4 + 8 = 6 + 5 = 7 + 9 = 9 + 2 =7 + 5 = 9 + 2 = 3 + 8 = 9 + 4 = 1 + 9 =8 + 5 = 4 + 9 = 7 + 3 = 9 + 5 = 6 + 8 = 5 + 7 = 1 + 9 = 8 + 7 = 9 + 5 = 4 + 7 = 5 + 5 = 4 + 6 = 8 + 4 = 7 + 7 = 6 + 8 = 3 + 7 = 6 + 8 = 9 + 4 = 8 + 5 = 4 + 9 =5 +6 = 3 + 9 =7 + 6 = 6 + 5 = 9 + 1 =6 + 5 =7 +8 =9 + 5 = 7 + 8 = 8 + 7 = 9 + 8 = 7 + 7 = 7 + 5 = 7 + 3 = 5 + 7 =题数:50 共:100分分秒成绩:6 + 5 =7 + 3 = 7 + 9 = 7 + 7 = 6 + 5 =8 + 4 = 8 + 8 = 7 + 8 =9 + 6 = 5 + 9 = 8 + 2 = 7 + 7 = 8 + 9 = 7 + 9 = 8 + 7 = 8 + 2 = 7 + 6 = 6 + 7 = 5 + 8 = 2 + 8 = 2 + 9 = 7 + 3 = 6 + 8 = 9 + 5 = 6 + 6 = 2 + 8 = 9 + 5 = 7 + 9 = 9 + 9 = 5 + 8 = 8 + 5 = 6 + 8 = 9 + 6 = 5 + 7 = 8 + 5 = 8 + 6 = 7 + 7 = 5 + 6 = 2 + 9 = 4 + 8 = 5 + 8 = 9 + 7 = 8 + 5 = 4 + 9 = 5 + 7 = 5 + 9 = 6 + 6 = 9 + 6 = 6 + 7 = 4 + 6 =题数:50 共:100分分秒成绩:4 + 9 = 8 +5 =6 +7 = 9 + 7 =8 + 5 = 8 +9 = 9 + 8 = 4 + 8 = 6 + 4 = 8 + 3 = 5 + 9 = 6 + 4 = 6 + 5 = 9 + 8 = 9 + 3 = 9 + 4 = 8 + 2 = 8 + 6 = 4 + 9 = 3 + 9 = 6 + 5 = 9 + 5 = 7 + 3 = 9 + 7 = 7 + 5 = 8 + 8 = 8 + 5 = 4 + 7 = 9 + 4 = 9 + 2 = 5 + 6 = 5 + 8 = 6 + 7 = 9 + 9 = 8 + 8 = 9 + 4 = 4 + 8 = 1 + 9 = 5 + 9 = 3 + 8 = 8 + 7 = 5 + 5 = 9 + 6 = 8 + 3 = 7 + 7 = 8 + 8 = 2 + 8 = 5 + 7 = 9 + 9 = 6 + 9 =题数:50 共:100分分秒成绩:7 + 4 = 9 + 5 = 5 + 6 = 4 + 8 = 3 + 8 =7 + 4 = 9 + 7 = 4 + 7 = 4 + 6 = 1 + 9 =8 + 3 = 7 + 5 = 7 + 6 = 9 + 1 = 4 + 6 = 1 + 9 = 4 + 8 = 5 + 5 = 9 + 6 = 6 + 8 = 8 + 9 = 8 + 3 = 4 + 7 = 8 + 9 = 8 + 3 = 6 + 7 = 5 + 6 = 3 + 9 = 3 + 9 = 9 + 7 = 3 + 9 = 6 + 6 = 4 + 6 = 6 + 9 = 4 + 9 = 1 + 9 = 8 + 4 = 6 + 4 = 8 + 6 = 5 + 9 = 7 + 8 = 6 + 6 = 3 + 7 = 7 + 4 = 9 + 6 = 9 + 4 = 9 + 5 = 8 + 5 = 8 + 8 = 4 + 9 =。
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五、20以内的进位加法1.9加几、8加几[知识要点]1.用“凑十法”口算9加几、8加几的进位加法。
2.认识图文结合的表格式应用题,正确说出条件和问题并列出算式。
[双基同步训练]1.在框内填上得数是10的算式。
2.填数(1)在□里填上合适的数。
(2)在( )里填上合适的数。
9+3=9+( )+( ) 9+9=9+( )+( )8+3=8+( )+( ) 8+7=8+( )+( )3.把得数相同的算式用线加起来。
4. 4=□5=□3=□7=□8+ 5=□9+ 6=□7=□8=□6=□9=□5.算式:+ =○○○○○○○○○○○○○○算式:+ =算式:+ = 6.看图列算式。
(1)(3)8.计算下面各题。
8+3=9+4=8+4=9+2=8+9=9+8=8+8=9+3=9+6=8+2=8+5=8+6=8+7=4+6=10+7=9+10=9.先计算,再找规律。
和的个位上的数比第二个加数少□。
和的个位上的数比第二个加数少□。
10.列式计算。
11.口算。
10-3=8+4=4+5+3=9-1=9-8=8-2-4=8+2=5-5=9-3+6=15+3=8+7=8-4+5=7+5=5+6=8+2+7=3+9=11-1=6-5+8=9+6=14-10=[创新能力训练]1.△+○=15 △=( )△-○=1 ○=( )2.将1、2、3、4、5、6、7、8填入□中,使算式成立,每个数字只能用一次。
□-□=1 □-□=2□-□=3 □-□=43.猜一猜1加1不等于2。
(猜一字)九加九。
(猜一字)纵横交错。
(猜一数学运算符号)独一无二。
(猜一数学运算符号)二、四、六、八、十。
(猜一成语)一、二、三、四、五。
(猜一成语)[实践能力训练]1.芳芳有朵9朵一共有多少朵?82.小兔采了14个吃了4个,还剩多少个?3.小方有6面小旗,小明有8面,一共有几面?4.动物园有9只大猴,8只小猴,一共有多少只猴?5.刚刚有10本书,借给同学6本,还剩几本?6.学校操场左边有6棵大树,右边的树与左边同样多,学校操场两边共有多少棵树?7.苹苹有8本书,借给同学5本,还剩几本?2.7加几、6加几[知识要点]1.7加几、6加几的进位加法。
(用凑十法)2.认识一步加减法应用题的结构,根据加减法的含义列出算式。
[双基同步训练]1.填数。
(2)2.根据“凑十”法的思路填空7+5=7+□+□ 9+9=□+□+□ 6+8=□+□+□ 8+5=8+□+□ 3.把计算结果相同的算式用线连起来。
4.( )里应填什么数?(1)比9大2的数是( ),比7多4的数是( )。
(2)由1个十和3个一组成的数是( )。
(3)17是由( )个十和( )个一组成。
5.在得数相同的算式下面画“——”。
7+8 6+4 10+5 17-2 (1)6+6 8+3 5+5 7+4 (2)15-1 8+4 16-3 7+6 (3)17-5 7+5 10+3 8+4 (4)6.在○里填上“>”、“<”或“=”。
9+3○14 8+7○15 6+6○11 8○+4 9+9○17 5+9○147.在( )里填上适当的数。
7+( )=12 8+( )=12 6+( )=13 7+( )=16 9+( )=15 6+( )=12 7+( )=14 8+( )=15 6+( )=10 7+4=4+( ) 8+6=6+( )(1) 9 8 4 6 53 □ 3 □ 3 □4 □ 4 □7+2 3+8 9+3 6+8 5+10 8+4 7+7 5+4 9+28+8 1511 13 129+6=6+( ) 5+7=7+( )8+4=7+( ) 6+6=10+( )8.计算6+9=6+5=6+8=10-6=8-3=9-7=9+8=6+7=2+7=8+4=7+4=8+6=6+5=9+5=6+6=9+3=7+8-3=5+6+4=14-4-3=8+9-5=6+6+6=18-3-2=4+9+3=8+2-7=10-3+4=9.看图列算式(1)算式:(2)算式:(1)算式:(4)算式:(5)算式:(6)算式:10.根据2、3、4、5、6、7、8、9这几个数写4道和是11和差是4的算式。
□+□=11 □+□=4□+□=11 □+□=4□+□=11 □+□=4□+□=11 □+□=4[创新能力训练]1.小明读一本故事书,第一天读7页,第二天读8页,第三天要从第几页读起?2.1只猫吃一只老鼠要2分钟,6只猫吃6只老鼠要几分钟?3.看图,在10个小圆圈内把1到10这10个数字填进去,使得任意两个相邻的数的和等于这两个数相应的两个数之和。
4.按规律画箭头4+8−→−2+9−12-10−→14+3 6+8 11+517-10 7+7 16-10[实践能力训练]1.奶奶养了7只白兔,5只黑兔,奶奶一共养了多少只兔?□○□=□( )口答:奶奶一共养了只兔。
2.庆“六一”,小红做了8朵红花,又做了9朵黄花,小红一共做了几朵花?□○□=□( )口答:小红一共做了朵花。
3.一盘鸡蛋有10个,吃了8个,还剩多少个?□○□=□( )口答:还剩个。
4.学校足球队有16个足球,借走了6个,现在还有几个足球?□○□=□( )口答:现在还有个足球。
5.小明先吃了7颗糖,又吃了6颗糖,两次共吃了几颗糖?□○□=□( )口答:两次共吃了颗糖。
6.动物园里有16只送给其他动物园6只,还剩多少只?□○□=□( )口答:还剩只。
3.5、4、3、2加几[知识要点]用交换加数位置的方法,口算5、4、3、2加几的进位加法。
即看到小数加大数时,想成大数加小数,再计算。
[双基同步训练]1.看图列算式求值。
□+□=□□+□=□□+□=□□+□=□2.把得数相等的算式用线连起来。
3.看谁算得又对又快。
5+8=8+9=7+7=4+9=4+8=7+6=6+8=5+7=10+4=16-4=18-4=19-5=19-7=17-3=15-2=16-3=3+8=2+9=7+4=8+8=8+8-5=13-3+5=15-4+8=8+2+6=7+2+6=5+3+4=4.填空。
(1)3+9=□(2)5+8=□想:□加□得□想:□加□得□(3)8+4=4+□6+5=5+□2+9=9+□3+8=8+□4+7=7+□5+8=8+□5.在( )里填上合适的数。
3+( )=11 4+( )=13 3+( )=12 6+( )=10 5+( )=14 6+( )=11 2+( )=10 ( )+8=12 5+( )=11 6.在○里填上“+”或“-”。
4○8=12 2○9=11 15○4=119○6=13 8○7=15 6○5=117○7=8○6 14○2=6○67.按得数填算式。
5+6 5+8 2+9 17-44+8 9+3 5+7 15-410+3 6+6 10+4 7+48.填表。
男生有女生有一共有美术组7人8人人科技组4人9人人音乐组6人4人人[创新能力训练]1.小猴爬竿,每次上两节滑下一节。
请你算一算竹竿有5节,小猴爬到竿顶上要爬几次?2.在空圈里填上数,使每条线上的3个数的和等于圈中间的数。
3.小华有18本书,小明有10本书,小华给( )本小明,两人的书就一样多了?4.在□里填数,使每相邻的三个数的和是15。
7 2 65.李红比张明大3岁,比小珊小2岁,( )的年龄最大,( )的年龄最小。
6.王小林有10块糖,后一半给刘稚,他们两人各有多少块?[实践能力训练]1.汽车上有18个人,到站后下去了6人,汽车上还有多少人?□○□=□( )口答:汽车上还有人。
2.李明上午写了5个字,下午写了9个字,一天共写了几个字?□○□=□( )口答:一天共写了个字。
3.植树节,学校要种16棵树,已经种了10棵,还要种几棵?□○□=□( )口答:还要种棵。
4.小华有7本书,小明送给他5本,小华现在有多少本书?□○□=□( )口答:小华现在有本书。
5.小华有7本书,送给小明3本,小华现在有多少本书?□○□=□( )口答:小华现在有本书。
6.学校修桌椅。
修好了4张,还有8张没有修,学校要修桌椅多少张?□○□=□( )口答:学校要修桌椅张。
7.8根短绳结成一根长绳,一共打几个结?□○□=□( )口答:一共打个结。