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数学
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(+5又3/8)-(+7又3/4)=?(-4又1/3)-(-4又2/5)=?
人气:215 ℃ 时间:2020-03-29 11:04:34
解答
(+5又3/8)-(+7又3/4)
=5又3/8-7又3/4
=-3又5/8
(-4又1/3)-(-4又2/5)
=-4又1/3+4又2/5
=1/15
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