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85问答库 > 5⼀8-括号2⼀5-3⼀8三括号用简便计算

5⼀8-括号2⼀5-3⼀8三括号用简便计算

2025-03-16 11:55:42

推荐回答（3个）

回答1：

5/8-（2/5-3/8）
=5/8-2/5+3/8
=5/8+3/8-2/5
=1-2/5
=3/5

回答2：

5/8-(2/5-3/8)
=5/8-2/5+3/8
=5/8+3/8-2/5
=1-2/5
=3/5

回答3：

=5/8+3/8-2/5=1-2/5=3/5

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