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32.8 5.6 7.2怎么简算

32.8+5.6+7.2 =32.8+7.2+5.6 =40+5.6 =45.6

32.8乘0.2+7.2除以5的简便算法 32.8x0.2+7.2÷5 =32.8÷5+7.2÷

32.8*1.72-0.72*32.8 =32.8x(1.72-0.72) =32.8x1 =

72×8-64×4 =(72-32)×8 =40×8 =320 你好,本题已解答,如果满意

看图

需要化成乘法才可以结算,其他的可以问老师。

47.8-32.2-7.8 =47.8-(32.2+7.8) =47.8-40 =7.8

7.2x0.32÷0.8 = 7.2x(0.32÷0.8) = 7.2x0.4 = 2.88

32.80.2+7.2÷5 =32.80.2+7.20.2 =(32.8+7.2)0

利用乘法结合律。

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