5.2-(3.9-2.8)、怎用简便方法计算

5.2-(3.9-2.8)、怎用简便方法计算
2025-06-27 13:14:35
推荐回答(2个)
回答1:

5.2-(3.9-2.8)
=5.2+2.8-3.9
=8-3.9
=4.1
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回答2: