-4×(-1⼀6+1⼀5-2又1⼀4-7⼀12)×15简便运算

2025-03-03 07:39:04
推荐回答(1个)
回答1:

=-60×(-1/6+1/5-2又1/4-7/12)
=60×1/6-60×1/5+60×2又1/4+60×7/12
=10-12+135+35
=168