(简算) (7⼀15-1⼀3)÷(1⼀3+1⼀5) (3⼀4+1⼀2)÷5⼀8 2⼀13+3⼀4÷9⼀10+1⼀6 [3⼀4-(5⼀8-1⼀4)]÷3⼀8

2024-11-25 11:24:12
推荐回答(1个)
回答1:

(7/15-1/3)÷(1/3+1/5)
=(7-5)÷(5+3)
=1/4

(3/4+1/2)÷5/8
=3/4x8/5+1/2x8/5
=6/5+4/5
=2

2/13+3/4÷9/10+1/6
=2/13+5/6+1/6
=2/13+1
=1又2/13

[3/4-(5/8-1/4)]÷3/8
=(3/4+1/4-5/8)x8/3
=3/8x8/3
=1