(3分之1-6分之1+2分之1)乘以(-12)
人气:473 ℃ 时间:2020-03-22 22:54:24
解答
(3分之1-6分之1+2分之1)乘以(-12)
=-1/3x12+1/6x12-1/2x12
=-4+2-6
=-8
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