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(-4又7/8)-(-5又1/2)+(-4又1/4)-(+13又1/8)
人气:475 ℃ 时间:2020-04-18 20:21:33
解答
(-4又7/8)-(-5又1/2)+(-4又1/4)-(+3又1/8)
=-4+5-4-3-7/8+1/2-1/4-1/8
=-6+1/2-1/4-(7/8+1/8)
=-7+1/4
=-(6又3/4)
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