7⼀10-括号1⼀6+1⼀5括回。3⼀4减括号3⼀8+1⼀8括回,3⼀5+括号3⼀4-3⼀5括回。

2024-12-27 19:28:28
推荐回答(1个)
回答1:

7/10 -(1/6+1/5)
=7/10 -1/5-1/6
=1/2-1/6
=1/3

3/4-(3/8+1/8)
=3/4-1/2
=1/4

3/5+(3/4-3/5)
=3/5-3/5+3/4
=3/4