5×96+5.7×4+0.7×66的简便算法 - 知识问答

5×96+5.7×4+0.7×66的简便算法

3个回答

5×96+5.7×4+0.7×66
=5×96+5×4+0.7×4+0.7×66
=5×（96+4）+0.7×（4+66）
=5×100+0.7×70
=500+49
=549

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