4年級脫式計算題帶答案和過程,4年級脫式計算題帶答案和過程

2021-06-18 13:49:35 字數 8483 閱讀 6700

1樓:

1、24.6-3.98+5.4-6.02

此題利用加法交換結合律,湊整再計算。步驟如下:

24.6-3.98+5.4-6.02

=(24.6+5.4)-(3.98+6.02)

=30-10

=202、27×17/26

此題先用加法分配律,把27轉換成(26+1),再利用乘法結合律,使得運算簡便。

27×17/26

=(26+1)×17/26

=26×17/26+1×17/26

=17+17/26

=17又17/26

3、50×49×2

此題運用乘法交換律:a×b=b×a,交換3個數的位置,先計算50×2,再跟49相乘,使得運算簡便。

50×49×2

=50×2×49

=100×49

=4900

4、4.27÷26.8x3.59÷42.7x2.86÷35.9

此題先使用乘除法的交換律,交換各個數的位置,再分別運算,使得運算簡便。

4.27÷26.8x3.59÷42.7x2.86÷35.9

=4.27÷42.7×2.68÷26.8×3.59÷35.9

=0.1×0.1×0.1

=0.001

5、3.5×4/5+5.5×80%+0.8

此題先把4/5和80%換算成0.8,0.8寫作1×0.8,再利用乘法分配律做簡便計算,方法如下:

3.5×4/5+5.5×80%+0.8

=3.5×0.8+5.5×0.8+1×0.8

=(3.5+5.5+1)×0.8

=10×0.8=8

2樓:商制

408-12×24 = 408 - 288 = 120

(46+28)×60 = 74 x 60 = 4440

42×50-17 = 2100- 17 = 2083

32+105÷5 = 32 + 21 = 53

420×(327-238) = 420 x 89 = 37380

(4121+2389)÷7 = 6510 ÷7 = 930

5180-705×6 = 5180 - 4230=950

405×(3213-3189) =405x24 = 9720

125×(97-81) =125x16 =2000

6942+480÷3 = 6942 + 160 = 7102

20+80÷4-20 = 20 + 20 -20 = 40 -20 = 20

100÷(32-30)×0 = 100 ÷2 x0= 50 x0 = 0

25×4-12×5 = 100 - 60 = 40

70×〔(42-42)÷18〕=70 x (0÷18) = 70x0 = 0

75×65+75×35 = 75 x (65 +35) = 75x100 = 7500

3樓:新野旁觀者

158+262+138 375+219+381+225 5001-247-1021-232

(181+2564)+2719 378+44+114+242+222 276+228+353+219

(375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99999

7755-(2187+755) 2214+638+286 3065-738-1065

899+344 2357-183-317-357 2365-1086-214

497-299 2370+1995 3999+498

1883-398 12×25 75×24

138×25×4 (13×125)×(3×8) (12+24+80)×50

704×25 25×32×125 32×(25+125)

88×125 102×76 58×98

178×101-178 84×36+64×84 75×99+2×75

83×102-83×2 98×199 123×18-123×3+85×123

50×(34×4)×3 25×(24+16) 178×99+178

79×42+79+79×57 7300÷25÷4 8100÷4÷75

16800÷120 30100÷2100

32000÷400 21500÷125

49700÷700 1248÷24 3150÷15 4800÷25

2356-(1356-721)

1235-(1780-1665) 75×27+19×2 5

31×870+13×310 4×(25×65+25×28)

(300+6)x12 25x(4+8) 125x(35+8) (13+24)x8

84x101 504x25 78x102 25x204

99x64 99x16 638x99 999x99

99x13+13 25+199x25

32x16+14x32 78x4+78x3+78x3

125x32x8 25x32x125 88x125 72x125

3600÷25÷4 8100÷4÷75

3000÷125÷8 1250÷25÷5

1200-624-76 2100-728-772

273-73-27 847-527-273

278+463+22+37 732+580+268

1034+780320+102 425+14+186

214-(86+14) 787-(87-29)

365-(65+118) 455-(155+230)

576-285+85 825-657+57

690-177+77 755-287+87

871-299 157-99 363-199 968-599

4樓:心在天邊

你好,很高興地解答你的問題。

1、56+31+24

=(56+24)+31

=80+31

=111

2、615+475+125

=615+(475+125)

=615+600

=1215

3、125×64

=125×8×8

=1000×8

=8000

4、 89+101+111

=101+(89+111)

=101+200

=301

5、24+127+476+573

=(24+476)+(127+573)

=500+700

=1200

6、400-273-127

=400-(273+127)

=400-400

=07、327+(96-127)

=327-127+96

=200+96

=296

8、70×98

=70×(100-2)

=7000-140

=6860

9、442-103-142

=442-142-103

=300-103

=197

10、999+99+9

=1000+100+10-3

=1110-3

=1107

11、67×5×2

=67×(5×2)

=67×10

=670

12、25×(78×4)

=25×4×78

=100×78

=7800

13、72×125

=9×(8×125)

=9×1000

=9000

14、9000÷125÷8

=9000÷(125×8)

=9000÷1000

=915、400÷25

=400÷100×4

=4×4

=1616、25×36

=25×4×9

=100×9

=900

17、103×27

=(100+3)×27

=2700+81

=2781

18、76×102

=76×(100+2)

=7600+152

=7752

19、3600÷25÷4

=3600÷(25×4)

=3600÷100

=3620、99×35

=(100-1)×35

=3500-35

=3465

21、(25+12)×4

=25×4+12×4

=100+48

=148

22、56×27+27×44

=(56+44)×27

=100×27

=2700

23、56×99+56

=56×(99+1)

=56×100

=5600

24、125×25×8×4

=125×8×(25×4)

=1000×100

=100000

25、25×32×125

=(25×4)×(8×125)

=100×1000

=100000

5樓:fro嗖

不知道您需要幾道題,就先給您出幾道,不夠可以再追問。

6樓:小_橙_子

例題如圖,望採納!!

50道五年級脫式計算題帶過程和答案,有答案和過程的加分,謝謝了。 15

7樓:匿名使用者

50道五年級脫式計算題帶過

8樓:匿名使用者

下次自己做題,我可不幫你了!

0.4×125×25×0.8

=(0.4×25)×e68a84e8a2ad62616964757a686964616f31333433616234(125×0.8)

=10×100=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3=24.9

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

=10008999

14.8×6.3-6.

3×6.5+8.3×3.

7=(14.8-6.5)×6.

3+8.3×3.7=8.

3×6.3+8.3×3.

78.3×(6.3+3.7)

=8.3×10

=831.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

933-157-43

=933-(157+43)

=933-200

=733

4821-998

=4821-1000+2

=3823

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

9000÷72×(1.25×0.7×8)

=9000÷72×7

=125×7

=875

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5

=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=4800÷100

=482/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=1 0.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3

=24.9

9999×1001

=9999×(1000+1)

=9999×1000+9999×1

=10008999

14.8×6.3-6.

3×6.5+8.3×3.

7=(14.8-6.5)×6.

3+8.3×3.7=8.

3×6.3+8.3×3.

7=8.3×(6.3+3.7)

=8.3×10

=831.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

933-157-43

=933-(157+43)

=933-200

=733

4821-998

=4821-1000+2

=3823

32×125×25

=4×8×125×25

=(4×25)×(8×125)

=100×1000

=100000

1.8+18÷1.5-0.5×0.3

=1.8+12-0.15=13.8-0.15=13.65 6.5×8+3.5×8-47=52+28-47=80-47=33

3.7x2.56-2.3

=9.472-2.3

=7.172

1.24+0.78+8.76

=(1.24+8.76)+0.78

=10+0.78

=10.78

1/2-(4/5-1/2)

=1/2+1/2-4/5=1-4/5

=1/5

4800÷25÷4

=4800÷(25x4)

=4800÷100

=482/5-(3/8-3/5)

=2/5+3/5-3/8

=1-3/8

=5/8

3/4-(3/7-1/4)

=3/4+1/4-3/7

=1-3/7

=4/7

3.2x0.125x2.5

=0.125x8x(0.4x2.5)

=1x1

=10.4×125×25×0.8

=(0.4×25)×(125×0.8)

=10×100

=1000

1.25×(8+10)

=1.25×8+1.25×10

=10+12.5

=22.5

9123-(123+8.8)

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×(1.24+1.76)

=8.3×3

=24.9

61-(1.25+2.5×0.7)

=61-3

=58[(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125

=19.05-16

=3.05

408-12×24

=408-288

=120

(46+28)×60

=74x60

= 4440

42×50-17

= 2100-17

= 2083

32+105÷5

=32+21

= 53

420×(327-238)

= 420x89

= 37380

(4121+2389)÷7

=6510÷7

= 930

3.416÷(0.016×35)

= 3.416 ÷0.56

= 6.1

0.8×[(10-6.76)÷1.2]

= 0.8 x(3.24÷1.2)

= 0.8 x 2.7

= 2.16

5.67×0.2-0.62

= 1.134-0.62

= 0.514

0.4×0.7×0.25

=0.4x0.25x0.7

=0.1×0.7

= 0.07

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