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12×(234-285)÷13简便算式方法？

2025-04-01 01:34:44

推荐回答（2个）

回答1：

脱式计算12×（234-285）÷13
解题思路：四则运算规则（按顺序计算、先算乘除后算加减，有括号先算括号，有乘方先算乘方）即脱式运算（递等式计算）需在该原则前提下进行
解题过程：

12×（234-285）÷13

=-12×51÷13

=-612÷13

=-612/13

存疑请追问，满意请采纳

回答2：

原式=12*(-51)/13
=(13-1)*(-51/13)
=13*(-51/13)-1*(-51/13)
=-51+51/13
=-51+3+12/13
=-48+12/13
=-47又1/13

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