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2017-10-10
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1.25×0.7+1.25×1.2+0.125
=1.25×0.7+1.25×1.2+1.25x0.1
=1.25x(0.7+1.2+0.1)
=1.25x2
=2.5
=1.25×0.7+1.25×1.2+1.25x0.1
=1.25x(0.7+1.2+0.1)
=1.25x2
=2.5
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用乘法分配律简便计算。
1.25×0.7+1.25×1.2+0.125
=1.25×0.7+1.25×1.2+1.25×0.1
=1.25×(0.7+1.2+0.1)
=1.25×2
=2.5
1.25×0.7+1.25×1.2+0.125
=1.25×0.7+1.25×1.2+1.25×0.1
=1.25×(0.7+1.2+0.1)
=1.25×2
=2.5
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