1.25×4.5+0.76×3.5+4.9×0.35简便计算
1个回答
1.25×4.5+0.76×3.5+4.9×0.35
=1.25×4.5+3.5×(0.76+0.49)
=1.25×4.5+3.5×1.25
=1.25×(4.5+3.5)
=1.25×8
=10
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