小数乘法简便运算

2022-08-02 18:07:18   文档大全网     [ 字体: ] [ 阅读: ]

#文档大全网# 导语】以下是®文档大全网的小编为您整理的《小数乘法简便运算》,欢迎阅读!
乘法,小数,运算,简便
小数乘法简便运算

一、乘法凑整

1 4×2.3×2.5 8×0.7×12.5

小试身手

0.25×8.5×4 4.36

2.5×0.8×1.25×0.4 0.4

2 0.25×3.6 5.6

小试身手

0.125×7.2 2.5

0.25×3.2×12.5 4.1

×12.5×0.8 0.125×0.96×8 ×1.3×8×2 1.25×0.9×8××0.125 ×1.2×2 1.6×1.25×4.7 ×2.5×2.8 1.25×6.2×2.4 12.5


二、乘法分配律

1 4.8×10.1 0.85×9.9

小试身手

102×0.43 3.2×10.1 3.5



9.5×0.9 100.04×4.5 0.25

三、乘法分配律的逆运算(提取公因数)

1 3.72×3.56.28×3.5 15.6

2 9.7×999.7 6.3

小试身手

4.6×0.90.1×4.6 2.95×1012.95 3.65

×9.8 ×99.8 ×2.115.6×1.1 ×1016.3 ×0.470.37×3.65


0.33×4654×0.33 7.09×1.087.09×0.08 6.9×996.9

8.7×17.47.4×8.7 4.2×1.254.2×1.75 0.25×390.25

0.25×390.25 2.5

5.41×0.64.41×0.6 8.4

9.2×99 2.37

9.9×3.7 1.8



0.111×4.90.111×2.1 99

综合练习

×4.4×3 3.2×20.2 ×100.2 5.7×1.25×1.6 ×6.32.37×3.7 8.6×1018.6 ×91.8 5×1.03×0.2 ×4.94.9 54.7×6.296.29×44.7

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