1.25×2.65+12.5×0.735怎么简便运算?
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2020-09-29
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1.25×2.65+12.5×0.375简便计算?
解:原式=1.25×2.65+1.25×10×0.375
=1.25×(2.65+10×0.375)
=1.25×(2.65+3.75)
=1.25×6.4
=1.25×8×0.8
=10×0.8
=8
解:原式=1.25×2.65+1.25×10×0.375
=1.25×(2.65+10×0.375)
=1.25×(2.65+3.75)
=1.25×6.4
=1.25×8×0.8
=10×0.8
=8
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