Question

Tính nhanh :
P=24.(31+14)-31.(24-14)

 

Answer 1

`P = 24 . ( 31 + 14 ) - 31 . ( 24 - 14 )`

`P = 24 . 31 + 24 . 14 - 31 . 24 + 31 . 14`

`P = ( 24 . 31 - 31 . 24 ) + ( 24 . 14 + 31 . 14 )`

`P = 14 ( 24 + 31 )`

`P = 14 . 55 = 770`

Answer 2

P= 24.(31+14)-31.(24-14)

P=24.45-31.10

P=1080-310

P=770