小數簡便計算73道

2021-03-07 11:05:27 字數 6483 閱讀 6152

1樓:風之谷

小數乘除法計算題2010-02-07 09:24乘法:

5.6×2.9

3.77×1.8

0.02×96

5.22×0.3

9.99×0.02

4.67×0.9

5×2.44

1.666×6.1

9.432×0.002

5.6×6.5

4.88×2.9

5.61×4.3

8.9×2.4

5.5×55

9.77×0.02

1.384×5.1

8.78×83

2.6×61

0.059×0.2

4.268×1.7

57×5.7

9.46×2.85

17.8×6.4

1.5×4.9

2.5×0.88

5.555×5.2

2.22×3.33

7.658×85

36.02×0.3

56.78×8

除法:85.44÷16

42.84÷7

101.7÷9

67.5÷15

230.4÷6

21.24÷36

0.736÷23

43.5÷12

35.21÷7

39.6÷24

6.21÷0.03

210÷1.4

51.3÷0.27

91.2÷3.8

0.756÷0.18

0.66÷0.3

11.97÷1.5

69.6÷2.9

38.4÷0.8

15÷0.06

(迴圈小數的用簡便方法,除不盡保留2位小數):

8.2÷0.12

0.8÷0.9

76.4÷5.4

4.7÷3

1.25÷1.2

32÷42

14.36÷2.7

8.33÷6.2

1.7÷0.03

2.41÷0.7

用豎式計算

0.396÷1.2= 0.756÷0.36= 15.6×13=

0.18×15= 0.025×14= 3.06×36=

0.04×0.12= 3.84×2.6≈ 5.76×3= (保留一位小數)

7.15×22 90.75÷3.3 3.68×0.25

16.9÷0.13 1.55÷3.9 3.7×0.016

13.76×0.8= 5.2×0.6 8.4×1.3

6.4×0.5 4.48×0.4 5.25×5

35.4×4.2 0.042×0.54 0.76×0.32

0.25×0.046 2.52×3.4 1.08×25

0.12×0.5×0.16= 4.8×0.25= 0.125×1.4≈(保留兩位小數)

2.5÷0.7= (保留三位小數) 10.1÷3.3= (商用迴圈小數)

10.75÷12.5= (用乘法驗算) 3.25×9.04= (用除法驗算)

3、脫式計算(能簡算的要簡算)

2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9

7.28×99+7.28 4.3×50×0.2 64-2.64×0.5

26×15.7+15.7×24 (2.275 +0.625)×0.28

3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8

8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46

8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58

32+4.9-0.9 4.8-4.8×0.5 (1.25-0.125)×8

4.8×100.1 56.5×99+56.5 7.09×10.8-0.8×7.09

4.85 + 0.35 ÷ 1.4

8.7 × 17.4 - 8.7 × 7.4

12.5×0.4×2.5×8 0.87×3.16+4.64 9.5×101

0.68 ÷(5.2 -3.5)× 1.25

40.5 ÷ 0.81 × 0.18 4.8 ×(15 ÷ 2.4)

6.81+6.81×99 0.25×185×40 4.4×0.8-3.4×0.8

(9.37+9.37+9.37+9.37)× 2.5

2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.1

2.5×(3.8×0.04) 7.69×101 3.8×10.1

0.25×39+0.25 0.125×72 46×0.33+54×0.33

(8×5.27) ×1.25 6.81+6.81×99 0.25×185×40

6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.2

9.5×99 13.5×0.98 12.5×8.8

二、解方程:

54-x=24 7x=49 126÷x=42

13+a=28.5 2.4x=26.4 7.5x-3x=18

5×1.3-2x=5.5 24x+6x=63.6 5.6x+4.4x=5.2

x+3.86=5.46

17.89-x=12.89

40.8+x=57.3

x-3.25=16

2x+0.82=8.2

3+0.5x=7

7.8÷x=2.6

80x÷4=12

5-0.9x=2.75

2x+0.4x=48

6-2x+6x=18

35x+13x=9.6

0.52×5-4x=0.6

0.7(x+0.9)=42

1.3x+2.4×3=12.4

3.5x = 140

2x +5 = 40

15x+6x = 168

5x+1.5 = 4.5

13.7—x = 5.29

4.2 × 3—3x = 5.1 (寫出檢驗過程)

20.5-4x=8.1

3.6x÷1.2=9.75

18×1.5-1.7x=13.4

18.5x-9.9x=1.721

9.2x+1.5x=32.1

7.2×5-8x=11.2

4x+3×0.7=6.5

(口算)

0.6×1.2= 0.84÷0.6= 4.5×0.1=

15×0.4= 0.1×0.5= 2.8÷7=

100÷0.01= 1.4×3= 0.72÷8=

6÷0.03= 0.5×0.6= 40×0.9=

4÷0.5= 7×2.1= 8.89+0.1=

24×0.25= 0.1÷0.01= 2.4×0.8=

9×0.4= 10×0.01= 30.2-3.02=

4.3-0.25= 1-0.82= 9.6÷0.3=

2.6×0.01= 0×25.4= 4.8×0.4=

7.2+2.8=

12×2.5=

2.63+0.37=

0.7×16-16×0.2=

0.96÷0.3=

1.5-4.5=

2.5×0.4

1.4×2.5×4=

8-2.5=

6÷1.2=

9.2÷2.3=

24÷4+56÷4=

0.36+0.64=

4÷0.25=

1.8×5=

30×(200+3)=

8.4÷4.2=

8×1.5=

4.8÷0.3=

2.73+1.5×4=

計算下面各題(能簡算的要簡算)

7.05×23.7+7.05×76.3

0.125×3.2×2.5

12.81-(1.5+7.81)

8.7×2.6+6.4×8.7+8.7

1025-1125÷4.5×3.6

12.25-3.1+0.85-6.17

(1.9-1.9×0.9)÷(3.8-2.8)

2.65×1.7+1.35×1.7

列豎式計算,得數保留一位小數。

1.2×1.4= 0.37×8.4= 3.14×2.8=

0.85×1.12= 0.86×5.4= 0.15×2.34=

40÷14= 26.37÷31= 45.5÷38=

1560÷35= 4.8÷2.3= 1.55÷3.9=

7.2÷2.1= 3.87÷7= 146.4÷13=

5.63÷6.1= 2.84×0.03= 0.38×0.13=

26.37÷31= 32÷42= 2.84×0.03=

4.8÷23= 0.382×0.13= 4.2÷4.5=

列豎式計算

1.64+2.35= 8.

65-6.31= 28.448÷14= 0.

58×250= 12.5+3.6= 10.

88÷34= 10-7.64= 1.86×7= 13.

88-6.29= 926×0.15= 8÷500= 26.

3+7.93= 23×7.06= 100.

2-2.28= 44÷9(精確到百分位)

三、計算(能簡便的用簡便方法計算)

8×25×1.25×16

4.04×250

45.55-(6.82+15.55)

3.2×99+3.2 4.8×39+61×4.8 34.52-17.87-12.23

2.5×56+4.5×65 489×101-489 4.57+3.17+3.43+5.83

4.6×56+48×4.6-4.6×4

豎式計算:

18÷24= 43.68÷26= 25.3÷0.88=

0.1575÷3.15= 0.612÷1.8= 16.787÷0.28

(保留一位小數)

1、 算下面各題

2.36×0.22 2.8×4.58 3.57÷4.2 82.8÷36

45×2.46 3.6÷0.24 382.5÷45 6.4×5.48

2、 簡便計算

3.6×2.5+7.

5×3.6 2.5×1.

2 0.125×32 4.3×0.

9 6.5×102 3.25×99+3.

2518÷24= 43.68÷26= 25.3÷0.88=

0.1575÷3.15= 0.612÷1.8= 16.787÷0.28

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