13.4-13.4乘5⼀12+7⼀12 简便计算

2025-02-26 15:34:10
推荐回答(1个)
回答1:

13.4-13.4乘5/12+7/12
=13.4×(1-5/12)+7/12
=13.4×7/12+7/12
=(13.4+1)×7/12
=14.4×7/12
=8.4