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3.75-(-1/2)+(-4 2/3)+(-0.5)+(-6 3/4) 等于多少
人气:390 ℃ 时间:2020-04-16 07:48:42
解答
3.75-(-1/2)+(-4 2/3)+(-0.5)+(-6 3/4)
=15/4+1/2-14/3-1/2-27/4
=-3-14/3
=-23/3
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