视频1 视频21 视频41 视频61 视频文章1 视频文章21 视频文章41 视频文章61 推荐1 推荐3 推荐5 推荐7 推荐9 推荐11 推荐13 推荐15 推荐17 推荐19 推荐21 推荐23 推荐25 推荐27 推荐29 推荐31 推荐33 推荐35 推荐37 推荐39 推荐41 推荐43 推荐45 推荐47 推荐49 关键词1 关键词101 关键词201 关键词301 关键词401 关键词501 关键词601 关键词701 关键词801 关键词901 关键词1001 关键词1101 关键词1201 关键词1301 关键词1401 关键词1501 关键词1601 关键词1701 关键词1801 关键词1901 视频扩展1 视频扩展6 视频扩展11 视频扩展16 文章1 文章201 文章401 文章601 文章801 文章1001 资讯1 资讯501 资讯1001 资讯1501 标签1 标签501 标签1001 关键词1 关键词501 关键词1001 关键词1501 专题2001
4A沪教版数学专项练习递等式计算,能巧算的要巧算附参
2025-09-26 04:17:19 责编:小OO
文档
4A 沪教版数学专项复习递等式计算、能巧算的巧算

:___________日期:__________开场时间:_________完成时间:_________

1.

4×19×25×7

2.172+583-283+628

3.285×〔25+25+25+25〕

4.779+536+221+4

5.803-123-377

6.36×15÷36×15

7.25××125

8.7200÷36÷2

9.125×〔6×8〕×50

10.9000÷125÷8

11.125×34×8

12.300-225÷5+145

13.3500-175-925

14.6300÷〔63×5〕

15.355+260+140+245

16.32×25×125

17.425-38+75-162

18.136×101-136

19.126+95+74+805

20.8×35+8×90

21.630×24÷70÷12

22.639-148-252+261

23.〔408×4〕÷〔408×2〕

24.79×42+79+79×56

25.455+999×999+545

26.7300÷25÷4

27.〔13×125〕×〔3×8〕

28.178×101-178

29.84×36+×84

30.75×99+2×75

31.763+276+724

32.125×24

33.872-〔12×30-28〕

34.26×74+74×74

35.25×16×21

36.〔40+1〕×25

37.137×46-46×37

4A 沪教版数学专项复习递等式计算、能巧算的巧算参

:___________日期:__________开场时间:_________完成时间:_________

1.

4×19×25×7

2.172+583-283+628

=4×25×19×7

=172+628+583-283

=〔4×25〕×〔19×7〕

=〔172+628〕+〔583-283〕

=100×133

=800+300

=13300

=1100

3.285×〔25+25+25+25〕

4.779+536+221+4

=285×〔25×4〕

=779+221+536+4

=285×100

=〔779+221〕+〔536+4〕

=28500

=1000+1000

=2000

5.803-123-377

6.36×15÷36×15

=803-〔123+377〕

=36÷36×15×15

=803-500

=〔36÷36〕×〔15×15〕

=303

=1×225

=225

7.25××125

8.7200÷36÷2

=25×4×125×8×2

=7200÷〔36×2〕

=〔25×4〕×〔125×8〕×2

=7200÷72

=100×1000×2

=100

=200000

9.125×〔6×8〕×50

10.9000÷125÷8

=125×6×8×50

=9000÷〔125×8〕

=125×8×6×50

=9000÷1000

=〔125×8〕×〔6×50〕

=9

=1000×300

=300000

11.125×34×8

12.300-225÷5+145

=125×8×34

=300-45+145

=〔125×8〕×34

=300+145-45

=1000×34

=300+〔145-45〕

=34000

=300+100

=400

13.3500-175-925

14.6300÷〔63×5〕

=3500-〔175+925〕

=6300÷63÷5

=3500-1100

=〔6300÷63〕÷5

=2400

=100÷5

=20

15.355+260+140+245

16.32×25×125

=355+245+260+140

=4×25×8×125

=〔355+245〕+〔260+140〕

=〔4×25〕×〔8×125〕

=600+400

=100×1000

=1000

=100000

17.425-38+75-162

18.136×101-136

=425+75-38-162

=136×101-136×1

=〔425+75〕-〔38+162〕

=136×〔101-1〕

=500-200

=136×100

=300

=13600

19.126+95+74+805

20.8×35+8×90

=126+74+95+805

=8×〔35+90〕

=〔126+74〕+〔95+805〕

=8×125

=200+900

=1000

=1100

21.630×24÷70÷12

22.639-148-252+261

=630÷70×24÷12

=639+261-148-252

=〔630÷70〕×〔24÷12〕

=〔639+261〕-〔148+252〕

=9×2

=900-400

=18

=500

23.〔408×4〕÷〔408×2〕

24.79×42+79+79×56

=408×4÷408÷2

=79×42+79×1+79×56

=408÷408×4÷2

=79×〔42+1+56〕

=〔408÷408〕×〔4÷2〕

=79×99

=1×2

=79×〔100-1〕

=79×100-79×1

=7900-79

=7821

=2

25.455+999×999+545

26.7300÷25÷4

=455+545+999×999

=7300÷〔25×4〕

=999+999×999

=7300÷100

=999×1+999×999

=73

=999×〔1+999〕

=999×1000

=999000

27.〔13×125〕×〔3×8〕

28.178×101-178

=13×125×3×8

=178×101-178×1

=125×8×13×3

=178×〔101-1〕

=〔125×8〕×〔13×3〕

=178×100

=1000×39

=17800

=39000

29.84×36+×84

30.75×99+2×75

=84×〔36+〕

=75×〔99+2〕

=84×100

=75×101

=8400

=75×〔100+1〕

=75×100+75×1

=7500+75

=7575

31.763+276+724

32.125×24

=763+〔276+724〕

=125×8×3

=763+1000

=〔125×8〕×3

=1763

=1000×3

=3000

33.872-〔12×30-28〕

34.26×74+74×74

=872-〔360-28〕

=74×〔26+74〕

=872-360+28

=74×100

=872+28-360

=7400

=900-360

=540

35.25×16×21

36.〔40+1〕×25

=25×4×4×21

=40×25+1×25

=〔25×4〕×〔4×21〕

=1000+25

=100×84

=1025

=8400

37.137×46-46×37

=46×〔137-37〕

=46×100

=4600

巧算的核心:凑整。〔整十、整百、整千〕

20×5=100、25×4=100、125×8=1000。

必须在巧算题型中熟练掌握并应用:加法交换律、加法结合律、乘法交换律、乘法结合律、乘法分配律。下载本文

显示全文
专题