1.25×0.2×2.5怎么巧算,快

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1.25×0.2×2.5怎么巧算,快1.25×0.2×2.5怎么巧算,快1.25×0.2×2.5怎么巧算,快就是先算0.2×2.5=0.5然后算1.25×0.5=0.625先2.5和2乘然后再乘2.5

1.25×0.2×2.5怎么巧算,快
1.25×0.2×2.5怎么巧算,快

1.25×0.2×2.5怎么巧算,快
就是先算0.2×2.5=0.5
然后算1.25×0.5=0.625

先2.5和2乘然后再乘2.5

1.25×0.2×2.5
=1.25×2×2.5×0.1
=2.5×2.5×0.1
=6.25×0.1
=0.625

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