Question

trình bày chi tiết bài toán     

a 7/12+3/4 nhân 2/9

b 8/9-4/15:2/5

 

Answer 1

`7/12 + 3/4 xx 2/9`

`= 7/12 + 6/36`

`= 7/12 + 1/6`

`= 7/12 + 2/12`

`= 9/12`

`= 3/4`

__

`8/9 - 4/15 : 2/5`

`= 8/9- 4/15 xx 5/2`

`= 8/9 - 20/30`

`= 8/9- 2/3`

`= 8/9- 6/9`

`= 2/9`

Answer 2

a)

`7/12+3/4xx2/9`

`=7/12+1/6`

`=7/12+2/12`

`=9/12`

`=3/4`

b)

`8/9-4/15:2/5`

`=8/9-4/15xx5/2`

`=8/9-2/3`

`=8/9-6/9`

`=2/9`

Answer 3

ai làm đúng e tích đúng cho