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12/7÷(2/3-1/4) 要简算
人气:295 ℃ 时间:2020-05-27 09:18:30
解答
12/7÷(2/3-1/4)
=12/7×12÷(2/3×12-1/4×12)
=12/7×12÷(8-3)
=12/7×12/5
=144/35
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