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85问答库 > 3.12+3.12*7.8+1.2*3.12简便算法

3.12+3.127.8+1.23.12简便算法

2024-11-28 22:09:05

推荐回答（1个）

回答1：

解：3.12+3.12×7.8+1.2×3.12
=3.12×（1+7.8+1.2）
=3.12×10
=31.2
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