(1⼀5+3⼀10-7⼀15)*(-30) 求过程和结果

2024-12-18 22:37:06
推荐回答(1个)
回答1:

(1/5+3/10-7/15)*(-30)
=-1/5*30-3/10*30+7/15*30
=-6-9+14
=-1