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(-0.5)+3又4分之1+2.75+(-5又2分之1)
人气:194 ℃ 时间:2019-11-15 17:31:27
解答
(-0.5)+3又4分之1+2.75+(-5又2分之1)
=-0.5+3.25+2.75-5.5
=-0.5-5.5+3.25+2.75
=-6+6
=0
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