7.2×0.48+0.72×2.9+0.072×23的简便方法?
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发布时间：2024-10-12 00:00
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热心网友
时间：2024-10-26 13:43
7.2×0.48+0.72×2.9+0.072×23
＝0.72×4.8+0.72×2.9+0.72×2.3
＝0.72×(4.8+2.9+2.3)
＝0.72×10
＝7.2
