0.125×3.2×0.25×9.9 0.1怎么简便计算?
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1.25×3.28 +12.5×0.24 +125×0.0431
=1.25×3.28 +1.25×2.4 +1.25×4.31
=1.25×(3.28+2.4+4.31)
=1.25×9.99
=1.25×(10-0.01)
=1.25×10-1.25×0.01
=12.5-0.0125
=12.4875
=1.25×3.28 +1.25×2.4 +1.25×4.31
=1.25×(3.28+2.4+4.31)
=1.25×9.99
=1.25×(10-0.01)
=1.25×10-1.25×0.01
=12.5-0.0125
=12.4875
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