137×78/7的简便运算

日期:2021-11-06 03:50:43 人气:1

137×78/7的简便运算

137×78/7
=?140-3?×78/7
=140×78/7-3×78/7
=1560-33又3/7
=1526又4/7
等于1526又7分之4
    A+
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