(1⼀3-3⼀5+3⼀10)⼀(-7⼀30) 等于多少?要过程。

2024-12-18 21:29:08
推荐回答(1个)
回答1:

(1/3-3/5+3/10)/(-7/30)
=(1/3-3/5+3/10)×(-30/7)
=1/3×(-30/7)-3/5×(-30/7)+3/10×(-30/7)
=10/7+18/7-9/7
=19/7