括号4⼀5+1⼀4括号除以7⼀3加7⼀10。

2024-12-04 20:22:08
推荐回答(2个)
回答1:

9/10-(4/5+1/4)÷3/7=9/10-(16/20+5/20)÷3/7=9/10-21/20*7/3=9/10-49/20=18/20-49/20=-31/20

回答2:

(4/5+1/4)÷7/3+7/10
=(16/20+5/20)÷7/3+7/10
=21/20÷7/3+7/10
=49/20+14/20
=63/20