第一篇：五年級上冊小數(shù)簡便計算

（一）小數(shù)加減法計算

3.2＋0.36＋4.8＋1.64

0.456＋6.22＋3.78

6.9＋4.8＋3.1

1.29＋3.7＋2.71＋6.3

0.398+0.36+3.64

4.02＋5.4＋0.98

73.8－1.64－13.8－5.36

7.14－0.53－2.47

5.17－1.8－3.2

35.6－1.8－15.6－7.2

66.86－8.66－1.34

36.8－3.9－6.1

（二）小數(shù)乘除法計算

0.25×16.2×4

320÷1.25÷8

3.9÷（1.3×5）

3.52÷2.5÷0.4

9.6÷0.8÷0.4

2.5×2.4

3.2×0.25×12.5

15÷（0.15×0.4）

2.7÷45

8.54÷2.5÷0.4

0.25×0.73×4

4.6÷3.5

15.75+3.59－0.59+14.25

3.9－4.1＋6.1－5.9

14－7.32－2.68

3.2×0.25×12.5 12.5×0.96×0.8 4.2÷3.5

15.2÷0.25÷4

1.25×2.5×32

0.49÷1.4

18－1.8÷0.125÷0.8

930÷0.6÷5

70÷28

2.31×1.6×0.5×1.25

0.25×8.5×4

15÷0.25

乘法分配律的運用一

7.09×10.8－0.8×7.09

3.72×3.5＋6.28×3.5

27.5×3.7－7.5×3.7

3.83×4.56＋3.83×5.44

3.9×2.7＋3.9×7.3

7.6×0.8＋0.2×7.6

乘法分配律的運用二

3.14×0.68＋31.4×0.032

32.4×0.09＋0.1×3.24

1.28×8.6＋7.2×86

2.3×16+2.3×22+23×0.2

9.16×15－0.5×91.6

101×0.87-0.91×87

乘法分配律的運用三

28.6×101－28.6

1.87×9.9＋0.187 58.5×81-8.5

(45.9－32.7)÷8÷0.125

(1.25－0.125)×8

（2.5－0.25）×0.4

乘法分配律的運用四

0.8×100.1

0.79×199

0.85×199

3.65×10.1

4.6×102

0.65×101

7.74×（2.8－1.3）＋1.5×2.26

46×57＋23×86

乘法分配律的運用一

0.86×15.7－0.86×14.7

5.8×4.8＋4.8×4.2

6.12×1.25-2.12×1.25

7.09×10.8－0.8×7.09 7.24×5.2＋2.76×5.2 36.7×3.7－3.7×6.7

乘法分配律的運用二

3.65×4.7－36.5×0.37

8.8×0.25－0.48×2.5

48×0.56＋44×0.48

10.7×16.1-151×1.07 3.4×10.9+34-0.34×19

12.7×9.9＋1.27

乘法分配律的運用三

18.76×9.9＋18.76

56.5×9.9＋56.5

5.4×11-5.4

21×（9.3－3.7）－5.6

（7.7＋1.54）÷0.7

10.4－9.6×0.35

乘法分配律的運用四

0.89×100.1

0.85×9.9

0.32×403 4.8×10.1

4.96×25

8.9×1.01

0.279×343＋6.07×27.9+5×2.79

7.2×0.2＋2.4×1.4

14.23×12.3-1.423×22-1423

第二篇：小數(shù)簡便計算

????????小數(shù)簡便計算

1.135+3.346+5.557+7.768+9.979 1.996+19.97+199.8

9.8+99.8+999.8+9999.8+99999.8 2.89?4.68+4.68?6.11+4.68

1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19

6.11+9.22+8.33+7.44+5.55+4.56+3.67+2.78+1.89

17.4837-17.48?19+17.48?82 1.250.32?2.5

28.6767+32?286.7+573.4?0.05 754.7+15.9?25

172.46.2+2724?0.38 0.88812573+9993

0.00…01810.00…011 34.5?8.23-34.5+2.77?34.5

963個0 1028個0

????????下面有兩個小數(shù):

a=0.00…0105 b=0.00…019

1994個0 1996個0 求a+b,a-b,ab,a?b.12.34+23.45+34.56+45.67+56.78+67.89+78.91+89.12+91.23

6.25?0.16+264?0.0625+5.2?6.25+0.625?20

19.98?37-199.8?1.9+1998?0.82

0.035?935+0.035+3?0.035+0.07?61?0.5

13.5?9.9+6.5?10.1 19.98?37-199.8?1.9+1998?0.82

32.14+64.280.53780.25+0.537864.280.75-864.280.1250.5378

第三篇：簡便計算小數(shù)

加法結(jié)合律：

1.83+3.97+0.17

10-0.34-0.66

2.1+3.5+7.9+6.5

63.97-4.63-7.37

乘法結(jié)合律：

2.5X(1.32x0.4)

12.5x(3.4x0.8)

2.5x4.4

53.37+15.69-13.37

80x4.76x125

0.25x1.25x4x8

0.125x8.8

4.78+6.47-3.78

28x1.25x8 2.5x2.8x4x5 0.125x32

2.5x1.6

12.5x3.2x2.5

0.25x6.4x12.5

1.25x32x0.5

乘法分配律：

3.8x9.9+3.8x0.1

1.4x3.6+3.6x8.6

56.9x99+56.9

3.5x46+46x6.5

(12.5-1.25)x0.8 4.56x9.9+45.6 3.26x10.7-3.26x0.7

2.5x(4+0.4)0.35x199+0.35

3.2x0.64+0.32x3.6

5.2x9.8

0.45x102

3.7x9.9 0.78x101

第四篇：五年級小數(shù)乘法的簡便計算

五年級小數(shù)乘法的簡便計算

1、乘法交換律和結(jié)合律

1.78×2.5×4 1.25×4.3×0.8 0.25×4.78×4

1.25×32×0.25 7.52、乘法分配律

25×4.4 8.8

1.25×88 10.110.2×5.3 48

×16 1.25×1.25 3.6×0.34 102×1.25 99×16×2.5 ×0.25 ×0.43 ×0.75 9.8×2.6 9.9×1.2 10.4×0.25

（2.5+1.25）×8

23.8×99+23.8 23.8

1.48×2.5+1.48×7.5 8.8

（8-0.8）×1.25 ×101-23.8 ×22＋22×1.2 4.92×98＋4.92×3—4.92 2.8×103-2.8×2－2.8

3、變一變，能簡便算

48×0.56＋44×0.48 9.16

7.2×0.3＋3×0.28 4.8

3.65×4.7－36.5×0.37 7.7

4×53＋470×0.916 ×7.8＋78×0.52 ×（2.8-1.3）+1.5×2.26 12.7×9.9＋1.27 56.5×9.9＋5.564、用減法的性質(zhì)，可以簡便計算

4.73－1.2—1.8 6.83—2.5—1.5

3.75-（2.3－0.25）16.12－3.1＋3.88－6.9

17.25－3.2＋0.75－6.8 19.18-（2.34-0.82）-7.66

第五篇：小數(shù)簡便計算

五年級小數(shù)簡便計算

156.5－21.7－3.3－6.5

36.8－8.21+2.21

12.5×32×2.5

10.1×56

4.5×45＋4.5×54＋4.5

12.5×0.32×2.5

9.98×6.2

0.32×45＋0.32×54＋0.32

12.5×8.08

2.5×（33×44）

（0.13+0.13+0.13+0.13）×0.25

9.9×9.9+0.99

（0.125+0.25）×0.8

0.27×45+2.7×5.5

65×9.9+6.5

2.5×1.3×0.4

0.25×0.32×1.25

（2.5+0.25）×0.4

0.98×1.02

12.5×80.8

4.6×4.6+6.4×4.6－4.6

1.3×2.5+0.13×75

9.9×9.9+0.99

8.08×12.5

9.9×101－9.9

1.6×3.7×1.25

7.23×9.8

16.4÷0.2512÷0.25

100÷0.25×0.8

0.125×25×1.6

6.46×7.7+12.3×6.46 7.14－3.95+2.86－1.05 7.6×8.1+0.19×76

5.9×1.6+5.9×0.4

9.9×2.8

（6.78+6.78÷6.78－6.78）×6.78

70÷1.25

45.55－（6.82+15.55）

1.08×125

2.18÷2.5÷0.4

10.8×9.6+92×0.96

1.7÷0.4÷0.25

3.8×0.25÷0.38

7.1÷（0.25×0.71）

18.4－2.7－7.3－2.4

17.2－2.2+3.3－3.8

6.4－6.4×0.56－6.4×0.34

9.98×3.7

4.7×0.9+0.47

3.54×7.7+3.3×3.54－3.5415÷1.25

12.5×8.08

13.2－4.6+6.8－5.4

4.31×0.99

5.9×59+5.9×36+5×5.9

81.3－2.38－7.62

2.74×6.5－2.74+4.5×2.74

1.2÷1.25

（3.1+3.1+3.1+3.1）×2.5

7.4－7.4×0.7－7.4×0.2

2.5×4.04

1.25×3.2×0.25

7.92+3.08－3.54－6.45

7.13×0.5+7.13+8.5×7.13

9.9×2.8+28×0.01

8.8×1.25×0.2

（3.7×4.6+4.3×4.6）×12.5