a) 47 – [(45.24 – 52.12):14]

2 câu trả lời

`a) 47 - [(45.24 – 52.12):14]`

`= 47 - [12.(45.2-52) : 14]`

`=47 - [12.38 : 14]`

`= 47 - 456:14`

`=47 - 228/7`

`= 329/7 - 228/7`

`=101/7`

Answer

`47 - [(45 . 24 - 52 . 12) : 14]`

`= 47 - [(45 . 2 . 12 - 52 . 12) : 14]`

`= 47 - [(90 . 12 - 52 . 12) : 14]`

`= 47 - [12 . (90 - 52) : 14]`

`= 47 - [12 . 38 : 14]`

`= 47 - [456 : 14]`

`= 47 - 228/7`

`= 101/7`