Question

3.2*0.4+0.64/0.25*4能用简便方法计算吗？

Answer 1

3.2*0.4+0.64/0.25*4

=0.32*4+0.64*4*4

=0.32*4+0.32*8*4

=0.32*4（1+8）

=1.28*9

=11.52

这道数学题用到的简便计算方法是合并同类项，先乘除后加减。

Answer 2

解：3.2*0.4+0.64/0.25*4

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=3.2*10*0.4+64/25*4

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=4*（0.32+64/25）

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=4*(32/100+64/25)

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=4*（32/100+254/100）

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=4*286/100

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=11.44

Answer 3

简便方法就是:3.2*0.4+0.64/1＝128*0.01+0.64＝1.28+0.46＝1.74

Answer 4

3.2×0.4+0.64÷0.25×4
=3.2×0.4+0.64×4÷0.25
=0.32×4+0.64×4×4
=（0.32+0.64×4）×4
=（0.32+0.32×2×4）×4
=（0.32+0.32×8）×4
=（1+8）×0.32×4
=（10-1）×1.28
=10×1.28-1×1.28
=12.8-1.28
=11.52
过程非常详细请采纳，当然其实并不需要那么多步骤。
3.2×0.4+0.64÷0.25×4
=0.32×4+0.64×4×4
=（0.32+0.32×8）×4
=（10-1）×1.28
=11.52

Answer 5

3.2*0.4+0.64/0.25*4=0.32*4+0.64*4*4=0.32*4+0.32*8*4=0.32*4（1+8）=1.28*9=11.52这道数学题用到的简便计算方法是合并同类项，先乘除后加减。