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2.71.58+2.72.42+0.5怎样简便

分类: 作业答案 • 2021-12-19 15:56:01

问题描述：

2.7*1.58+2.7*2.42+0.5怎样简便

答

2.7×1.58+2.7×2.42+0.5
=2.7×﹙1.58+2.42﹚+0.5
=2.7×4+0.5
=10.8+0.5
=11.3

答

2.7*1.58+2.7*2.42+0.5
=2.7X(1.58+2.42)+0.5
=2.7X4+0.5
=10.8+0.5
=11.3