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7/4÷(2/3+1/2)×4/5(能简算的要简算)
人气:460 ℃ 时间:2020-03-28 18:13:11
解答
7/4÷(2/3+1/2)×4/5
=7/4×4/5÷(4/6+3/6)
=7/5÷7/6
=7/5×6/7
=6/5
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