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(—12)乘以(-2/3+1/4-1/2)
人气:420 ℃ 时间:2020-07-05 19:23:41
解答
(—12)乘以(-2/3+1/4-1/2)
=12×2/3-12×1/4+12×1/2
=8-3+6
=11
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