4×(-15)×(-1⼀6-3⼀20+4⼀5-7⼀12)脱式计算怎样算?

2024-12-03 15:59:59
推荐回答(1个)
回答1:

4×(-15)×(-1/6-3/20+4/5-7/12)
= -60×(-1/6)+60×3/20-60×4/5+60×7/12
= 10+9-48+35
=6