问题标题:
4.7乘以2.8+3.6乘以9.4怎样简便运算?
问题描述:
4.7乘以2.8+3.6乘以9.4怎样简便运算?
侯方勇回答:
4.7×2.8+3.6×9.4
=4.7×2.8+7.2×4.7
=4.7×(2.8+7.2)
=4.7×10
=47
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