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负4分之1加6分之5加3分之2减2分之1等于
人气:479 ℃ 时间:2019-10-11 02:21:21
解答
-1/4+5/6+2/3-1/2
=(5/6+2/3)-(1/4+1/2)
=(5/6+4/6)-(1/4+2/4)
=3/2-3/4
=6/4-3/4
=3/4
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