Question

Answer 1

Bài 1: 

`5/8 - 3/8 = 2/8 = 1/4`

`23/8- 7/8 = 16/8 = 2`

`17/24 - 1/3 = 17/24 - 8/24 = 9/24 = 3/8`

Bài 2: 

`5/7 + 10/13 xx 5/7 + 15/13 xx 5/7 + 1/13 xx 5/7`

`= 5/7 xx (1 + 10/13 + 15/13 + 1/13)`

`= 5/7 xx (1 + 26/13)`

`= 5/7 xx (1 + 2)`

`= 5/7 xx 3`

`= 15/7`

Answer 2

`5/8-3/8=(5-3)/8= 2/8=1/4`

`23/8 - 7/8=(23-7)/8=16/8=2`

`17/24 - 1/3=17/24 -  8/24=(17-8)/24= 9/24= 3/8`

`5/7 + 10/13 xx 5/7 + 15/13 xx 5/7 + 1/13 xx 5/7`

`= 5/7 xx ( 10/13 + 15/13 + 1/13+1 )`

`=5/7 xx3`

`=15/7`