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数学
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(7/12-5/18)÷1/12-2/3用简便方法计算
人气：268 ℃ 时间：2020-02-03 02:35:10
解答
=(7/12-5/18)×12-2/3
=7/12×12-5/18×12-2/3
=7-10/3-2/3
=7-(10/3+2/3)
=7-4
=3
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