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简算:(27-23)×12
人气:390 ℃ 时间:2020-01-29 17:41:28
解答
(27-23)×12
=[(25+2﹚﹣﹙25-2)]×2×6
=[25+2-25+2]×2×6
=[2+2]×2×6
=4×2×6
=8×6
=48
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