Lm bài 4 phần d,e,g vs bài 5 giúp mik nheee

Đáp án`+`Giải thích các bước giải:

Bài `4.` 

`a,` `13/15+4/7-101/105=151/105-101/105=10/21`

`b,` `2/5+3/5xx4/9=2/5+4/15=2/3`

`c,` `3/4xx5/2xx7/6=(3xx5xx7)/(4xx2xx6)=35/16`

`d,` `1/2:1/4-1/6=2-1/6=11/6`

`e,` `2/3-1/4+2/9=5/12+2/9=23/36`

`g,` `5/2+1/3xx3/2=5/2+1/2=3`

Bài `4.`

`a,` `4 3/8+5 2/3=35/8+17/3=241/24`

`b,` `2 3/8+1 1/4+3 6/7=19/8+5/4+27/7=29/8+27/7=419/56`

`c,` `2 3/8-1 1/4+5 1/3=19/8-5/4+16/3=9/8+16/3=155/24`