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(1又3/4-7/8-7/12)/(-7/8)
人气:342 ℃ 时间:2020-03-28 19:28:34
解答
(1又3/4-7/8-7/12)/(-7/8)
=(7/4-7/8-7/12)×(-8/7)
=7/4×(-8/7)-7/8×(-8/7)-7/12×(-8/7)
=-2+1+2/3
=-1/3
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