Question

Tính hợp lí:(39.17+39.12):29

Answer 1

`(39*17+39*12):29`

`=[39*(17+12)]:29`

`=39*29:29`

`=39*1`

`=39`

Answer 2

39 nhe

Answer 3

   (39.17 + 39.12): 29

= 39.(17 + 12): 29

= 39. 29: 29

= 39.(29 : 29)

= 39.1

= 39