17分之5加9分之5减6分之1加17分之12
人气:460 ℃ 时间:2019-11-10 23:19:34
解答
小屁孩的梦90,
5/17+5/9-1/6+12/17
=(5/17+12/17)-1/6+5/9
=1-1/6+5/9
=5/6+5/9
=5×(1/6+1/9)
=5×5/18
=25/18
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