加减乘除法口诀表之令狐文艳创作
沪科版初中数学目录之令狐文艳创作
沪科版初中数学目录令狐文艳备注:七年级上册:1-5七年级下册:6-11八年级上册:12-17八年级下册:18-22九年级上册:23-25九年级下册:26-28第1章有理数1.1 正数和负数1.2 数轴1.3 有理数的大小1.4 有理数的加减1.5 有理数的乘除1.6 有理数的乘方1.7 近似数第2章整式加减2.1 用字母表示数2.2 代数式2.3 整式加减第3章一次方程与方程组3.1 一元一次方程及其解法3.2 二元一次方程组3.3 消元解决方程组3.4 用一次方程(组)解决问题第4章直线与角4.1 多彩的几何图形4.2 线段、射线、直线4.3 线段的长短比较4.4 角的表示与度量4.5 角的大小比较4.6 作线段与角第5章数据处理5.1 数据的收集5.2 数据的整理5.3 统计图的选择5.4 从图表中获取信息第6章实数6.1 平方根立方根6.2 实数第7章一一次不等与不等式组7.1 不等及其基本质7.2 一元次不等式7.3 一元次不等式组第8章整乘除与因分解8.1 幂的算8.2 整式法8.3平方差式与完全方公式8.4 整式法第12章平面直角坐标系12.1 平面上点的坐标12.2 图形在坐标系中的平移第13章一次函数13.1 函数13.2 一次函数-13.3 一次函数与一次方程、一次不等式13.4 二元一次方程组的图象解法第14章三角形中的边角关系14.1 三角形中的边角关系14.2 命题与证明第15章全等三角形15.1 全等三角形15.2 三角形全等的判定第16章轴对称图形与等腰三角形16.1 轴对称图形16.2 线段的垂直平分线16.3 等腰三角形16.4 角的平分线第17章勾股定理17.1 勾股定理17.2 勾股定理的逆定理第18章二次根式18.1 二次根式18.2 二次根式的运算――――()第19章一元二次方程19.1 一元二次方程19.2一元二次方程的解法19.3一元二次方程的根的判别式19.4一元二次方程的根与系数的关系19.5 一元二次方程的应用第20章四边形20.1 多边形内角和20.2平行四边形20.3 矩形菱形正方形20.4 梯形第21章据的集中势21.1 平均21.2 中位与众数21.3从部看总体第22章数据的离程度22.1极差22.2 方差标准差第23章二次函数反比例函数23.1 二次数23.2 二次数y=ax^2图象和性质23.3二次第25章解直角三角形25.1 锐角三角函数25.2 锐角三角函数值25.3 解直角三角形及其应用第26章圆26.1 旋转26.2 圆的对称性26.3 圆的确定26.4 圆周角26.5 直线与圆的位置关系26.6 三角形的内切圆26.7 圆与圆的位置关系26.8 正多边形与圆26.9 弧长与扇形面积第27章投影与视图27.1 投影27.2 三视图第28章概率初步28.1 随机事件28.2 等可能情形下的概率计算28.3 用频数估计概率。
小学二年级数学顺口溜之令狐文艳创作
1、线段是直直的,两个端点圆圆的,画它一定用尺子,写上长度别忘记2、令狐文艳3、运算顺序歌打竹板,响连天,各位同学听我言,今天不把别的表,单把运算聊一聊,混合试题要计算,明确顺序是关键。
同级运算最好办,从左到右依次算,两级运算都出现,先算乘除后加减。
遇到括号怎么办,小括号里算在先,中括号里后边算,次序千万不能乱,每算一步都检查,又对又快喜心间3、认识钟表跑的最快是秒针,个儿高高,身材好;跑的最慢是时针,个儿短短,身材胖。
不高不矮是分针,匀速跑步作用大时、分的认识时针过了数字几,就是表示几时多,究竟多了多少分,请你仔细看分针。
4、我是1厘米1厘米,很淘气,仔细找,才见你。
指甲盖1厘米,伸出手指比一比。
长短和我差不多,大约就是一厘米。
100个我是1米,我是米的小兄弟,物体长了别用我,要不一定累死你。
5、大于号、小于号的用法大于号、小于号。
开口朝着大数笑。
6、笔算加法笔算加法要注意,相同数位要对齐;先从个位来加起,个位要是满了10,就向十位进上一。
7、退位减法退位减法要牢记,先从个位来减起;哪位不够前位退,本位加十莫忘记;如果隔位退了1,0变十来最好记。
8、成法口诀儿歌一只青蛙一张嘴,两只眼睛四条腿。
两只青蛙两张嘴,四只眼睛八条腿。
三只青蛙三张嘴,六只眼睛十二条腿。
四只青蛙四张嘴,扑嗵扑嗵跳下水。
9、四则混合运算顺口溜:混合试题要计算,明确顺序是关键。
“+”、“—”计算最好办,从左到右依次算;“+”、“—”、“×”、“÷”都出现,先算乘除后加减;遇到“()”怎么办,小括号里算在先;每算一步都检查,又对又快喜心间。
10、20以内进位加法看大数,分小数,凑整十,加零头。
(掌握“凑十法”,提倡“递推法”。
)11、20以内退位减法20以内退位减,口算方法和简单。
十位退一,个加补,又准又快写得数。
三、加法意义,竖式计算12、两数合并用加法,加的结果叫做和。
数位对其从右起,逢十进一别忘记。
13、减法的意义竖式计算从大去小用减法,减的结果叫做差。
基础500常用汉字字卡实用闪卡之令狐文艳创作
本254
思255
解256
立257
河258
爸259
村260
八261
难262
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论264
吗265
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让268
相269
研270
今271
其272
书273
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信278
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或290
围443
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教446
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包449
歌450
类451
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强453
数454
乡455
呼456
性457
音458
答459
哥460
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神463
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章465
帮466
啦467
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非472
何473
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除法口诀表、乘法口诀表之令狐文艳创作
数学版乘法口诀表令狐文艳1×1=11×2=2 2×2=41×3=3 2×3=6 3×3=91×4=4 2×4=8 3×4=12 4×4=161×5=5 2×5=10 3×5=15 4×5=20 5×5=251×6=6 2×6=12 3×6=18 4×6=24 5×6=30 6×6=361×7=7 2×7=14 3×7=21 4×7=28 5×7=35 6×7=427×7=491×8=8 2×8=16 3×8=24 4×8=32 5×8=40 6×8=487×8=56 8×8=641×9=9 2×9=18 3×9=27 4×9=36 5×9=45 6×9=547×9=63 8×9=72 9×9=81除法口诀表1÷1=12÷2=13÷3=14÷4=15÷5=16÷6 =1 7÷7=18÷8=19÷9=12÷1=24÷2=2 6÷3=28÷4=2 10÷5=2 12÷6=2 14÷7=2 16÷8=2 18÷9=23÷1=36÷2=39÷3=312÷4=3 15÷5=3 18÷6=3 21÷7=3 24÷8=3 27÷9=34÷1=48÷2=412÷3=4 16÷4=4 20÷5=4 24÷6=4 28÷7=4 32÷8=4 36÷9=45÷1=5 10÷2=515÷3=5 20÷4=5 25÷5=5 30÷6=535÷7=5 40÷8=5 45÷9=56÷1=6 12÷2=618÷3=6 24÷4=6 30÷5=6 36÷6=642÷7=6 48÷8=6 54÷9=67÷1=7 14÷2=721÷3=7 28÷4=7 35÷5=7 42÷6=749÷7=7 56÷8=7 63÷9=78÷1=8 16÷2=824÷3=8 32÷4=8 40÷5=8 48÷6=856÷7=8 64÷8=8 72÷9=89÷1=9 18÷2=927÷3=9 36÷4=9 45÷5=9 54÷6=963÷7=9 73÷8=9 81÷9=9大九九口诀表一一01 一二02 一三03 一四04 一五05 一六06 一七07一八08 一九09二一02 二二04 二三06 二四08 二五10 二六12 二七14二八16 二九18三一03 三二06 三三09 三四12 三五15 三六18 三七21三八24 三九27四一04 四二08 四三12 四四16 四五20 四六24 四七28 四八32 四九36五一05 五二10 五三15 五四20 五五25 五六30 五七35 五八40 五九45六一06 六二12 六三18 六四24 六五30 六六36 六七42 六八48 六九54七一07 七二14七三21 七四28 七五35 七六42 七七49 七八56 七九63 八一08 八二16 八三24 八四32 八五40 八六48 八七56 八八64 八九72九一09 九二18 九三27 九四36 九五45 九六54 九七63 九八72 九九81孩子应该怎样背诵九九乘法表:今天中午看幻想数学大战,里面的主人公淘气包知修三年级了还不会背九九乘法口诀表,我一时之间有一点错愕,难道世界上还有不会背诵九九乘法口诀的人吗?小九九真的这么难背诵吗?xx正好今年上二年级,也是需要背诵的,一年级放暑假时老师就留言让小朋友利用暑假把小九九背下来。
一年级下册口算题之令狐文艳创作
高新二小令狐文艳一年级5班何欣颖_____年____月_____日得分:___________12-3=12+6=13-8=14-5=12-8=8+5=11-5=20+7=16-9=12-5=9+4=18-9=17-8=15-9=14-4=_____年____月_____日得分:___________17-9=12-7=13-6=14-8=11-2=30+7=12-8=14-6=14+9=5+6=18-10=7+9=90-3=60+23=30+26=_____年____月_____日得分:___________35+40=42+30=50+21=35+30=28-8=36-20=37-7=57+8=80-60=7+80=9+70=71+9=48+6=99-6=75-5=_____年____月_____日得分:___________39+5=26-3=27+6=54-8=86-6=24+3=76-8=72-50=69+30=90+4=50-7=40+58=96-4=97-7=79+0=_____年____月_____日得分:___________67+9=90-6=50+26=98-70=8+40=62+8=70-5=46+4=12-4=45-40=80-30=25+9=14-8=17-9=72-2=_____年____月_____日得分:___________79-70=7+63=90-9=9+60=3+50=26-3=43+30=48+2=38+7=44+5=20+45=55+7=47+30=53-2=_____年____月_____日得分:___________25+8=50+16=97-60=36+7=92+8=9+8=18-6=19-9=13+8=18-10=22+6=8+7=15-6=14+5=_____年____月_____日得分:___________16-6=17+8=4+60=11+6=15+6=12-7=5+38=23+7=64-60=24-6=16-4=75-9=45+8=58+20=_____年____月_____日得分:___________62+7=47-5=54+4=3+40=15+4=35+2=98-9=4+76=68-7=73-6=70-3=24-10=72-3=75-20=_____年____月_____日得分:___________75+4=69+7=90-8=42+6=80+10=26+9=86-6=93-60=39-4=67-30=44+30=71+5=4+62=72-8=40+30=_____年____月_____日得分:___________86-4=56-6=27+9=34+6=35-20=60-3=95-9=76+8=25+8=34-20=94+6=47+30=20+45=100+0=4+60=_____年____月_____日得分:___________100-0=90-10=9-9=35-7=30+25=92+5=6+45=53-8=90-90=80-30=50-20=30-10=30+9=53-3=_____年____月_____日得分:___________90-30=80+9=80-60=50+40=20+50=38+30=67+20=56+30=43+1=66-4=60+33=27+40=93-70=45-20=_____年____月_____日得分:___________74-3=28+9=63+30=33+7=84-3=51+40=5+89=28+40=84-30=75+8=68-60=76-40=77-70=29+8=_____年____月_____日得分:___________20+16=13+70=45+30=45-30=45+3=15-4=39-4=29-3=16+9= 5+18= 17+3= 36+6= 29+5=87+9=48+8=_____年____月_____日得分:___________35+8=4+19=7+26=4+37=29+4=19+8= 29+7= 7+38=9+18= 40+6=35+30=62+8=75+5=23+7= 26+8=____年____月_____日得分:___________19+60= 32+8=16+9=24+6=5+37= 44+7= 67+9= 50+8=61+9=85+4=91+8=82+5= 39+1= 46+7=23+7=_____年____月_____日得分:___________37+4=78+3= 27+6=39+8= 68+5=9+25=85+6=92+4=86+2=48+7= 39+9=2+38=56+8= 36+5=35+6=_____年____月_____日得分:___________46+9= 9+25=23+8=46+6=90+9=84+7= 34+7= 56+3=12+9=93+3=58+3=6+40=45-5=6+56=_____年____月_____日得分:___________30+9= 29+6= 58-50= 37+5= 23-20= 67-60= 40+9=63-30= 42-2= 20+67= 56+10=23-6= 20+80= 51+8= 37-7=_____年____月_____日得分:___________57+30=72-60= 68-8=90-70= 7+50= 20+23= 50+28= 52-50= 58-3= 18+30=86-40= 40+47= 50+38= 5+43=68-5=_____年____月_____日得分:___________96-90= 48+8= 58-8= 55-3=52+30=47-7= 66-20= 70-7=77-9= 32+3= 90-40= 61+5=60+30=55-8=_____年____月_____日得分:___________7+33= 86-20= 86-40= 49+3=56+3= 22+50= 25+20= 7+42=17+50=30+20= 100-30=6+30= 88-60=7+40= 94-6=_____年____月_____日得分:___________100-70= 34+4= 74-7028+6= 7+64=29-7=35+2=73+4=25+4=43+5=87+10=39-3=48-30=95-40=81-2=_____年____月_____日得分:___________60+8=39+10=76+10=70+30=48-9=47-8=52-4=40-2=27-9=32-4=41-2=38-9=20-9=30-2=72-2=_____年____月_____日得分:___________66-4=53+5=35+2=39-4=8+50=20-1=60+8=40+6=62+7=89-5=63+3=34-20=80-7=50-4=11+2=_____年____月_____日得分:___________53-3=32+4=26-5=84+4=35-10=71+9=38-3=12+6=29-7=33+2=3+40=15+4=15-4=23+5=37+1=_____年____月_____日得分:___________29-3=18-2=30+8=43+1=86+2=70+3=8+50=30-2=72-2=66-4=39-2=20-9=20-1=53+5=35+2=_____年____月_____日得分:___________39-4=16+9=5+18=17+3=36+6=29+5=87+9=48+8=35+8= 4+19=7+26=4+37= 29+4=19+8=29+7= _____年____月_____日得分:___________7+38=9+18=40+6= 35+30=62+8=75+5= 23+7=26+8=19+60= 32+8=16+9=24+6= 5+37=44+7=67+9= _____年____月_____日得分:___________50+8=61+9=85+4= 91+8=82+5=39+1= 46+7=23+7=37+4= 78+3=27+6=39+8= 68+5=9+25=85+6= _____年____月_____日得分:___________92+4=86+2=48+7= 39+9=2+38=56+8= 36+5=35+6=46+9= 9+25=23+8=46+6= 90+9=84+7=34+7= _____年____月_____日得分:___________56+3=12+9=93+3= 58+3=75+7=35+6= 86+8=39+2=27+4= 50+5=34+9=10+60= 9+50=10+40=61+10= _____年____月_____日得分:___________18+5=74+6=37+2= 26+5=23+7=47+4=88+3=47+6=39+8= 68+5=26+8=19+6= 28+5=53+6=78+5= _____年____月_____日得分:___________37+9=23+8=。
新版北师大版三年级数学上册第四单元乘与除讲义之令狐文艳创作
第四单元乘与除令狐文艳【知识概要】1:整十(百、千)数乘一位数的乘法口算方法:高位乘起,乘完添零。
2:两位数乘一位数的乘法口算方法:高位乘起,乘完合并。
理解计算的过程,主要需要解决两个问题,一是如何把两位数转化成整十数和一位数的和,二是分别求乘积再相加的问题。
3:整十(百、千)数除以一位数的除法口算方法:高位除起,除完添零。
4:两位数除以一位数的除法口算方法:高位除起,除完合并。
理解计算的过程,主要需要解决两个问题,一是如何把两位数转化成整十数和一位数的和,二是分别求商再相加的问题。
5:利用乘除法解决实际的问题。
6:初步掌握用线段图来分析题意,解答应用题。
7:学习用列表法分析合理租车租船的问题。
【经典例析】...熊猫妈妈 熊猫宝宝(1)熊猫宝宝5天吃多少个竹笋?(2)400个竹笋够熊猫妈妈吃一周的吗?(3)1只熊猫妈妈和3只熊猫宝宝一天能吃多少个竹笋?【即讲即练】1、6×2= 4×9= 5×8= 5×6=6×20= 4×90= 5×80= 60×5=6×200= 4×900= 5×800= 5×600=( )x7=420 ( )x5=400 ( )x6=3002、填入>,<,=400×5 O 200×8 80×5 O 403、一个没有拧紧的水龙头,1小时大约浪费200克水,8小时大约浪费多少克水?我每天吃60个竹笋 我每天吃20个竹笋4、每个木鱼石保健杯的售价是60元,每套木鱼石茶具的售价是木鱼石保健杯的4倍。
(1)买一套木鱼石茶具需要多少钱?(2)买一套木鱼石茶具和一个木鱼石保健杯多少钱?5、6、从公园大门到中心湖的笔直道路的一侧共有201棵柳树(包括两端),每相邻两颗柳树之间是9米,这条道路有多长?(1)买3个足球需要多少钱?(2)李老师拿了100元买3个足球够吗?如果够,还剩多少元?【即讲即练】1. 34=30+430×2=()34×2 4×2=()()+()=()2.33×2=44×2=13×4=12×4= 13×3=39×2=22×4= 41×2= 25×4=11×9= 22×3= 3×27=3.三(一)班有36名学生,平均每名学生为希望小学捐款2元,三(一)班一共捐款多少钱?.8元/支 16元/个 18元/盒()元/个(1)一个书包的价钱是一个文具盒的6倍,一个书包多少元?(2)元元买了一盒油画棒和一些钢笔,一共花了42元,她买了几支钢笔?(3)王老师买了一个文具盒和12支钢笔给学生发奖,这些奖品一共需要多少钱?『例题1』(线段图分析题).甲工程队修一条公路,第一天修了35米,第二天修的是第一天的2倍,两天一共修了多少米?【即讲即练】1.育林小学校园里一共栽了19棵柳树,栽的杨树的棵树是柳树的4倍,校园里一共栽了多少棵树?.2、有3袋相同的糖果,每袋有25颗,每名同学发一颗,还要再取12颗才够分,一共有多少名同学?『例题2』贝贝有21张画片,乐乐的画片是贝贝的3倍,明明的画片是乐乐的2倍多5张。
100以内加减法速算方法之令狐文艳创作
小学低年级数学令狐文艳100以内加减法速算方法低年级学生的100以内的加减法属教学重难点,教起来比较较困难,现就我这两年来总结的两点方法与大家共享。
方法 1.两位数加两位数的进位加法:口诀:加9要减1,加8要减2,加7要减3,加6要减4,加5要减5,加4要减6,加3要减7,加2要减8,加1要减9(注:口决中的加几都是说个位上的数)。
例:26+38=64 解 :加8要减2,谁减2?26上的6减2。
38里十位上的3要进4。
(注:后一个两位数上的十位怎么进位,是1我进2,是2我进3,是3我进4,依次类推。
那朝什么地方进位呢,进在第一个两位数上十位上。
如本次是3我进4,就是第一个两位数里的2+4=6。
)这里的26+38=64就是6-2=4写在个位上,是3进4加2就等于6写在十位上。
再如42+29=71。
就用加9要减1这句口决,2-1=1,把1写在个位上,是2我进3,4+3=7,把7写在十位上即得71。
本办法学会了百试百灵,比计算器还快。
两位数加两位数不进位加的就直接写得数就行,如25+34=59,个位加个位写在等号后的个位上5+4=9,十位加十位写在十位上即可2+3=5,即59。
不必列竖式计算。
方法2.两位数减两位数的退位减法。
口决: 口诀:减9要加1,减8要加2,减7要加3,减 6要加4,减 5要加5,减4要加6,减 3要加7,减 2要加8,减 1要加9。
(注:口决中的减几都是说减个位上的数)。
例:73-46=27,解:减6要加4,谁加4?3加4等于7写在个位上,减数的十位是4我退5,谁退5?7退5,即27。
(注:如何退位?减数的十位是1你退2,是2你退3,是3你退4,依次类推,但必须是个位减个位不够减的情况才能这样退,够减就直接个位减个位,十位减十位直接定出得数即可。
)以上两种方法是我利用了一年级教材中的凑十法演变而来的。
它们的口决大体一致,只需记住了其中的一种,另一种方法即可融会贯通。
二十以内加减法(已排版)之令狐文艳创作
20以内加减法练习(1)令狐文艳姓名:时间:18- 5 = 17-11 = 13+ 6 = 17- 5 =16-10 = 5 - 4 = 9 - 4 = 16- 1 =7 +10 = 9 - 0 = 18+ 1 = 6+10 =4 - 0 = 18-12 = 17-17 = 10+ 2 =10-10 = 9 - 0 = 15- 0 = 4+ 1 =0 +16 = 2 + 2 = 13-12 = 4+12 =13+ 4 = 6 - 5 = 15-13 = 14+ 1 =3 +12 = 0 + 0 = 0 +17 = 7- 2 =2 +14 = 11-10 = 11+ 4 = 10+ 4 =14- 3 = 11- 1 = 3 - 1 = 13- 2 =12- 0 = 11+ 0 = 13-10 = 15+ 4 =3 + 5 = 10+ 7 = 0 + 1 = 19-14 =11+ 1 = 17- 1 = 16+ 2 = 16- 4 =3 +4 = 1 +14 = 14+ 2 = 4+12 =12+ 5 = 14+ 1 = 10+ 8 = 17-15 =15- 3 = 9 - 8 = 11+ 5 = 16+ 1 =12+ 3 = 17-12 = 1 +17 = 11+ 5 =2 + 6 = 19- 5 = 7 -3 = 12+ 4 =10+ 7 = 1 +12 = 11+ 1 = 17-10 =9 - 9 = 4 +12 = 11+ 2 = 13+ 2 =20以内加减法练习(二)姓名:时间:成绩:16- 1 = 19-13 = 4 - 3 = 1 +14 =15- 3 = 6 - 5 = 13+ 1 = 11+ 1 =19- 1 = 2 + 6 = 19-18 = 2 +11 =2 + 6 = 18-13 = 12+ 7 = 3 + 1 =3 +4 = 16-14 = 18- 2 =5 + 4 =2 - 2 = 7 -3 = 6 - 0 = 7 +11 =13- 3 = 8 - 6 = 0 +18 = 10+ 3 =18-11 = 17+ 0 = 2 - 2 = 1 + 7 =6 - 3 = 13+ 1 = 5 +14 = 11+ 0 =7 - 1 = 0 +10 = 6 - 1 = 2 + 6 =11-10 = 11+ 3 = 5 +10 = 12-10 =0 +11 = 5 +10 = 5 - 5 = 19-11 =17-13 = 2 + 2 = 3 +11 = 10+ 3 =17- 3 = 1 - 0 = 9 - 5 = 19- 8 =8 + 0 = 17- 1 = 13-10 = 17+ 0 =5 - 3 = 9 - 8 = 7 - 3 = 2 - 2 =14- 2 = 5 - 3 = 0 + 4 = 9 - 8 =17-14 = 16-14 = 3 +12 = 3 - 0 =19-15 = 18- 2 = 11+ 2 = 14-12 =1 + 3 = 5 +11 = 10+ 5 = 11- 1 =20以内加减法练习(三)姓名:时间:成绩:5 - 2 = 7 -6 = 12+ 6 = 10+ 9 =14+ 5 = 1 + 3 = 2 +10 = 8 +10 =10+ 8 = 2 - 1 = 9 - 1 = 9 - 5 =1 + 8 = 12+ 6 = 9 - 3 = 8 -2 =17-11 = 11-10 = 7 - 6 = 19- 3 =15-11 = 7 - 4 = 16-14 = 5 - 2 =8 - 6 = 15- 2 = 16-13 = 3 +11 =8 - 7 = 2 +17 = 5 +14 = 14+ 4 =11+ 3 = 5 +12 = 16-12 = 7 + 2 =17- 4 = 7 +11 = 18- 7 = 4 + 5 =19- 5 = 10+ 1 = 2 +15 = 19- 5 =12-11 = 3 + 3 = 18- 4 = 19-10 =16-16 = 1 + 8 = 1 +13 = 1418-11 = 18- 7 = 0 +19 = 12+ 1 =15-11 = 12+ 3 = 18-13 = 6 - 0 =1 + 7 = 18-16 = 18- 6 = 9 - 1 =6 - 3 = 13- 1 = 19-15 = 8 - 0 =6 - 6 = 0 +19 = 9 - 2 = 3 - 3 =12+ 3 = 2 +11 = 7 - 3 = 13- 2 =8 - 0 = 1 + 5 = 15+ 3 = 18-15 =20以内加减法练习(四)姓名:时间:成绩:2 + 4 = 19-17 =3 + 6 = 2 - 1 =17-10 = 1 +15 = 7 - 6 = 3 + 6 =2 +14 = 5 +13 = 15+ 1 = 1917- 2 = 2 + 3 = 14+ 0 = 13+ 0 =0 + 1 = 18-12 = 18- 8 = 0 + 1 =12-11 = 4 +11 = 12+ 7 = 3 +13 =14+ 5 = 19- 1 = 14+ 1 = 3 +12 =12+ 4 = 17-11 = 5 + 3 = 17-11 =6 +10 = 17-16 = 18- 1 = 2 + 3 =6 +12 = 12-10 = 5 +10 = 3 + 6 =17-14 = 11+ 1 = 19-17 = 4 + 5 =5 - 3 = 19-19 = 4 + 3 = 7 + 1 =4 - 3 = 3 + 1 = 4 - 2 = 1 + 7 =13- 1 = 15- 3 = 7 - 1 = 12+ 2 =1 +10 = 7 +10 = 15-10 = 18- 6 =1 + 7 = 3 -2 = 18-3 = 16-14 =1 +18 = 13- 0 = 15- 0 = 19-19 =17+ 0 = 16- 4 = 2 - 2 = 12-12 =19- 4 = 11+ 2 = 3 +15 = 3 - 0 =0 + 9 = 4 +10 = 0 +11 = 4 - 0 =20以内加减法练习(五)姓名:时间:成绩:4 - 3 = 0 +5 = 9 - 0 = 19-18 =17+ 2 = 16+ 1 = 12-10 = 9 - 1 =1 + 7 = 10+ 8 = 5 +2 = 17- 6 =18- 8 = 3 - 0 = 0 - 0 = 19- 1 =11-10 = 12-10 = 7 - 3 = 12-11 =15-12 = 15-11 = 6 +10 = 1 +13 =4 + 3 = 3 +14 = 2 +13 = 18- 2 =8 - 4 = 6 - 2 = 9 - 1 = 2 +14 =10+ 2 = 7 - 4 = 15-11 = 8 +10 =13- 3 = 1 +12 = 4 +15 = 2 + 4 =15- 1 = 16- 2 = 10+ 3 = 1 +14 =16+ 2 = 10+ 7 = 2 + 5 = 2 + 6 =1 +2 = 14+3 = 11+ 8 = 1 + 1 =17-16 = 1 + 2 = 5 +14 = 12+ 4 =18-17 = 12+ 3 = 17-15 = 6 - 1 =6 - 5 = 6 + 2 = 16+ 3 = 1+14 =16+ 1 = 4 +15 = 2 + 3 = 18-13 =7 - 1 = 15- 1 = 17- 6 = 3 +15 =1 +2 = 12+3 = 16- 1 = 5 +12 =15-11 = 19-18 = 11+ 6 = 11+ 2 =20以内加减法练习(六)姓名:时间:成绩:19+ 0 = 1 +18 = 7 - 1 = 1+16 =4 + 2 = 16-15 = 1 - 1 = 17-16 =7 + 1 = 5 - 2 = 2 + 4 = 19-17 =10+10 = 6 - 1 = 1 + 0 = 1+11 =2 +10 = 0 + 4 = 18-15 = 12- 1 =15-13 = 5 +14 = 3 + 0 = 1+15 =6 - 0 = 8 - 0 = 12+7 = 15-11 =13+ 4 = 0 + 0 = 19- 8 = 13+ 5 =18- 6 = 18- 4 = 1 +16 = 1+13 =9 - 0 = 8 - 0 = 9 - 2 = 2+10 =14- 2 = 18- 6 = 19-14 = 12- 2 =0 +17 = 10+ 6 = 5 + 4 = 18- 6 =19-19 = 1 +14 = 3 +13 = 17- 5 =16- 3 = 18- 4 = 7 +11 = 16-13 =12+ 5 = 10+ 3 = 5 - 1 = 5+ 1 =6 + 1 = 9 - 5 = 4 + 1 = 9- 9 =14-10 = 16- 6 = 13-10 = 3+14 =6 - 1 = 15- 5 = 5 + 3 = 15+ 4 =18- 2 = 19-13 = 11+ 5 = 5+ 3 =19- 1 = 16-14 = 15- 4 = 19- 8 =20以内加减法练习(七)姓名:时间:成绩:16-14 = 2 +12 = 11+ 3 = 19- 5 =17-14 = 17+ 2 = 4 +14 = 13- 3 =1 +14 = 16-11 = 12-10 = 19- 8 =2 + 6 = 7 + 2 = 14-10 = 9 - 6 =19- 5 = 6 - 5 = 15- 5 = 4 +12 =10+ 6 = 0 +16 = 16- 2 = 19- 1 =2 +15 = 2 +12 = 16- 2 = 18-16 =2 +17 = 10-10 = 19- 7 = 14-13 =15-15 = 12- 1 = 0 +11 = 7 +11 =14-12 = 15- 2 = 11+ 0 = 1 + 2 =1 +15 = 0 +11 = 0 + 9 = 17-10 =1 + 8 = 15+ 0 = 5 + 0 = 14+ 0 =3 + 2 = 6 - 1 = 5 + 0 = 16- 1 =13-12 = 1 + 3 = 9 + 0 = 8 - 7 =18- 4 = 13-11 = 9 - 7 = 18- 4 =2 + 5 = 10+ 5 =3 +11 = 15-14 =17-12 = 12-12 = 6 +10 = 17-17 =4 - 1 =5 - 2 = 2 + 5 = 10+ 8 =15- 3 = 1 +14 = 6 +12 = 2 - 1 =- 2 =20以内加减法练习(八)姓名:时间:成绩:6 +13 = 1 +14 = 8 + 1 = 14+ 5 =18- 1 = 3 +10 = 14+ 4 = 8 - 7 =12-11 = 17-16 = 10+ 9 = 3 + 4 =1 +13 = 12+2 = 10+3 = 12+4 =3 +12 = 16+ 2 = 7 -4 = 19-10 =14-10 = 11+ 6 = 19-16 = 2 +12 =7 +11 = 10+ 6 = 2 + 4 = 16+ 3 =3 +12 = 17- 5 = 19- 3 = 11+ 8 =1 + 4 = 18- 3 = 1 + 7 = 19- 4 =- 3 =4 + 4 = 18- 1 = 8 - 8 = 15+ 2 =14+ 3 = 5 + 3 = 10+ 7 = 17- 3 =12+ 7 = 10+ 3 = 16- 0 = 3 +16 =15-14 = 14- 2 = 9 +10 = 15-12 =5 - 3 = 2 +13 = 18+ 0 = 18- 3 =8 + 0 = 1 - 0 = 19-19 = 6 - 1 =6 - 3 = 11- 1 = 13-11 = 1 + 4 =16- 2 = 14-10 = 14-13 = 11+ 2 =11- 0 = 13-10 = 14- 2 = 16+ 2 =10+ 6 = 14- 3 = 4 + 3 = 18-17 =20以内加减法练习(九)姓名:时间:成绩:15-12 = 19-18 = 19-18 = 6 +12 =10+ 2 = 17- 3 = 7 - 3 = 2 +11 =11+ 1 = 13-10 = 2 +10 = 0 + 5 =6 + 2 = 12- 2 = 17- 6 = 1 + 2 =2 +13 = 13+4 =5 + 2 = 19- 5 =1 +12 = 9 - 1 = 2 + 1 = 11+ 4 =18+ 1 = 12-12 = 15- 2 = 7 +12 =1 +14 = 19-10 = 19-12 = 4 - 1 =17-15 = 2 + 3 = 16-16 = 1 - 0 =7 - 1 = 19- 1 = 1 + 4 = 2 + 2 =1 +15 = 19-18 = 19-18 = 173 - 0 = 7 - 0 = 7 - 1 = 12-11 =3 +13 = 0 +10 = 11+ 0 = 8 - 6 =5 +12 = 19-18 = 15-10 = 17- 1 =1 +13 = 11+ 8 = 12+ 3 = 16- 1 =17- 5 = 0 +18 = 18-14 = 17- 6 =8 - 7 = 13+ 0 = 2 + 2 = 5 + 2 =8 + 0 = 3 + 6 = 4 +12 = 9 - 5 =6 - 1 = 2 + 3 = 17+ 2 = 3 +13 =5 - 0 = 3 - 0 = 11+ 5 = 0 + 4 =20以内加减法练习(十)姓名:时间:成绩:9 +10 = 14-11 = 8 + 0 = 311+ 7 = 16- 0 = 5 + 3 = 0 +11 =1 + 8 = 12-2 = 15- 1 = 6 - 5 =19- 4 = 19-15 = 9 - 8 = 3 + 6 =18- 5 = 8 +11 = 5 + 3 = 17+ 1 =14+ 2 = 3 + 4 = 14-12 = 18- 7 =4 +13 = 2 + 7 = 15- 1 = 18-18 =3 +16 = 11-10 = 2 - 2 =4 + 3 =16- 6 = 6 +10 = 17+ 2 = 8 + 1 =8 - 6 = 4 + 2 = 9 - 4 = 10+ 3 =1 +15 = 6 - 5 = 1 +12 = 13-11 =17-15 = 14+ 1 = 17-16 = 16- 5 =18-10 = 15-10 = 1 +18 = 2 - 1 =10+ 5 = 8 - 8 = 5 + 3 = 1 +17 =16-15 = 16+ 2 = 2 - 1 = 10+ 3 =3 +11 = 11-10 = 1 + 7 = 6 + 3 =2 +12 = 11-10 = 1 +12 = 7 +10 =12+ 2 = 16-11 = 7 - 7 = 5 +12 =2 +16 = 7 -3 = 14- 1 = 11+ 2 =5 - 3 = 16- 3 = 12+ 1 = 9 - 5 =20以内加减法练习(十一)姓名:时间:成绩:18-11 = 10+ 7 = 15-12 = 1+16 =1 +16 = 5 - 5 = 3 + 3 = 10+ 6 =18-12 = 7 - 7 = 4 - 1 = 12- 1 =0 + 1 = 7 - 0 = 1 +10 = 15- 5 =2 +3 = 19- 9 = 17-4 = 11+ 2 =4 - 4 = 16+ 1 = 6 - 2 = 16- 1 =16+ 3 = 5 - 5 = 18+ 0 = 7+11 =5 +12 = 13- 2 = 2 +6 = 8- 4 =16+ 3 = 1 +13 = 4 - 0 = 7- 2 =18-10 = 17- 5 = 8 - 3 = 0+11 =9 + 0 = 16- 6 = 16- 0 = 2+ 4 =13+ 3 = 4 - 0 = 3 + 2 = 16-12 =17- 4 = 0 +16 = 0 + 6 = 19+ 0 =10+ 4 = 8 - 2 = 3 +11 = 2+ 6 =+ 3 =10+10 = 16-14 = 9 - 4 = 4+ 3 =5 - 4 = 7 - 5 = 5 + 4 = 5- 3 =17- 3 = 17- 4 = 14- 2 = 2+ 1 =15+ 3 = 1 + 4 = 19-17 = 7+ 2 =17-16 = 15- 4 = 15-12 = 14-12 =20以内加减法练习(十二)姓名:时间:成绩:3 + 3 = 5 + 1 = 19- 5 = 18-16 =2 + 6 = 18- 8 = 2 +16 = 8 - 5 =15+ 1 = 7 - 3 = 5 - 2 = 16-13 =14+ 3 = 14+ 1 = 13- 2 = 3 +14 =- 2 =1 +16 = 14+2 = 1 +14 =3 +14 =7 - 5 = 7 - 1 = 10- 0 = 15+ 1 =5 +10 = 2 + 5 = 11+6 = 8 - 8 =11+ 7 = 9 - 6 = 10+ 6 = 1 + 0 =7 - 1 = 17+ 0 = 19- 2 = 15-10 =8 - 2 = 11+ 0 = 5 + 2 = 4 +10 =2 + 4 = 2 +3 = 12+ 3 = 15-14 =1 +16 = 16- 3 = 18-10 = 17- 4 =15- 4 = 15+ 2 = 16-14 = 8 +10 =15-10 = 15- 2 = 3 - 3 = 0 +19 =15- 2 = 2 +10 = 5 +14 = 815- 4 = 7 - 3 = 2 +10 = 7 +11 =11-10 = 14+ 2 = 12+ 0 = 4 + 3 =19-19 = 4 +15 = 13- 0 = 12-12 =5 +10 = 1 + 1 = 19- 3 = 15- 2 =20以内加减法练习(十三)姓名:时间:成绩:9 - 2 = 17- 3 = 8 - 6 = 10+ 1 =18- 5 = 1 +10 = 19-18 = 8 - 2 =2 + 2 = 8 - 7 = 11+ 1 = 16+3 =4 +10 = 19- 9 = 3 + 0 = 19-5 =12- 1 = 17- 3 = 3 + 1 = 17-12 =17-16 = 12-11 = 3 +10 = 59 - 3 = 10+ 9 = 19- 6 = 2 +10 =17- 2 = 4 +15 = 3 + 2 = 1 + 1 =17-14 = 7 - 6 = 16- 5 = 3 +10 =13+ 6 = 1 + 2 = 6 - 2 = 18- 1 =0 +11 = 5 +14 = 0 + 7 = 0 + 6 =19-16 = 0 + 0 = 18-13 = 18- 1 =0 +11 = 1 +17 = 0 + 2 = 13-10 =0 + 3 = 1 +15 = 9 - 9 = 10-10 =3 +12 = 16- 0 = 0 + 0 = 17- 3 =19- 6 = 2 +13 = 1 +10 = 2 +13 =5 +12 = 12+ 7 = 8 - 7 = 7 - 4 =9 + 0 = 3 +12 = 0 +11 = 5 + 1 =12+ 0 = 18-11 = 1 + 4 = 19- 5 =1 +15 =2 + 4 = 16+ 1 = 6 +11 =20以内加减法练习(十四)姓名:时间:成绩:18- 7 = 19-11 = 10+ 9 = 6 - 5 =16- 5 = 1 + 7 = 12-10 = 7 + 2 =5 - 1 = 10+ 4 = 11+ 3 = 17-15 =15- 3 = 15- 4 = 17- 1 = 3 + 5 =18- 8 = 6 - 4 = 14-10 = 3 + 1 =9 - 1 = 19-10 = 2 + 2 = 7 + 1 =19- 6 = 8 - 4 = 2 +11 = 17- 2 =12+ 1 = 17-14 = 18- 6 = 4 + 3 =3 +10 = 14-12 = 12- 1 = 2 +16 =14+ 1 = 16-11 = 13-11 = 2 +14 =5 +10 = 15+ 2 = 1 +18 = 17-10 =12+ 1 = 19- 2 = 7 - 6 = 1 + 7 =6 - 1 = 17+ 2 =7 - 1 = 7 + 1 =19-14 = 9 - 2 = 19-18 = 7 - 6 =1 +11 =2 +10 = 18-3 = 10+ 9 =14+ 4 = 0 + 3 = 17-11 = 18-12 =18- 5 = 14+ 4 = 0 +12 = 3 +11 =7 +10 = 7 + 0 = 2 + 6 = 5 +12 =5 +12 = 18- 3 = 19- 3 = 72 + 4 = 7 - 1 = 18-12 = 2 +17 =20以内加减法练习(十五)姓名:时间:成绩:19- 8 = 10+ 1 = 7 - 5 = 7 +11 =12+ 3 = 1 +14 = 17-14 = 1 +15 =1 + 1 = 9 - 5 = 6 + 1 = 0 +17 =6 +11 = 0 +17 = 6 - 1 = 16- 5 =13- 2 = 6 +12 = 15-14 = 7 + 0 =12+ 7 = 2 +10 = 5 +11 = 6 + 0 =13-10 = 16-13 = 5 + 2 = 16-14 =5 +13 = 2 +10 = 12+ 3 = 3 + 1 =19- 1 = 4 - 4 = 0 +18 = 122 +13 = 2 +15 = 19-13 = 18+ 0 =4 +13 = 9 - 0 = 6 -5 = 15- 4 =10+ 2 = 6 +13 = 3 + 6 = 12+ 1 =1 +18 = 18-11 = 1 + 8 = 4 + 4 =12+ 4 = 0 +16 = 8 - 2 = 3 +10 =2 + 1 = 6 - 6 =3 +13 = 6 - 3 =4 +13 =5 + 1 = 7 - 5 = 19-19 =13+ 2 = 16-14 = 16+ 3 = 13-13 =6 - 2 = 4 +12 = 10+ 0 = 6 - 2 =4 - 1 = 16-14 = 6 +12 = 15+ 3 =12-11 = 4 - 1 = 16-14 = 12+ 4 =。
速算口诀(整理后)之令狐文艳创作
一、什么是.系数令狐文艳在.速算法中,为了能够快速运算出任意两个位数相同数的乘积而发明的一种系数。
ab* cd=(a+1)*c*100+b*d+.系数*10 (a≥c).系数=(a-c)*d+(b+d-10) *c二、任意两位数乘以任意两位数的速算法试题:(1)68*54 (2)86*42 (3)46*23(4)78*74计算:例一:68*54 其系数=(6-5)*4+(8+4-10)*5=14 代入运算公式:68*54=ab*cd=(6+1)*5*100+8*4+14*10=3672 例二:86*42 其系数=(8-4)*2+(6+2-10)*4=0代入公式86*42= ab*cd=(8+1)*4*100+2*6+0=3612例三:46*23 其系数=(4-2)*3+(6+3-10)*2=4 代入公式:46*23= ab*cd=(4+1)*2*100+6*3+4*10=1058例四:78*74 其系数=(7-7)*4+(8+4-10)*7=14代入运算公式78*74= ab*cd=(7+1)*7*100+8*4+14*10=5772 三、两位数乘积,十位数相同的速算法试题:(1)78*73 (2)68*62 (3)87*88计算:例一:78*73 其系数=(7-7)*3+(8+3-10)*7=7 代入公式:78*73 =ab*cd=(7+1)*7*100+8*3+7*10 =5694例二:68*62 其系数=(6-6)*2+(8+2-10)*6=0 代入公式:68*62= ab*cd=(6+1)*6*100+8*2+0=4216例三:87*88 其系数=(8-8)*8+(7+8-10)*8=40代入公式:87*88= ab*cd=(8+1)*8*100+7*8+40*10=7656 从以上试题中,学者不难看出其系数有一定的规律性,只要将个位数相加减十,乘以十位数的和即可。
以上试题学者在一秒内得出答案,方为.速算。