SOS SOS SOS SOS sos sos sos

Đáp án + Giải thích các bước giải:

`a)`

`18 . 123 - 18 . 25 + 18 . 2`

`= 18 . ( 123 - 25 + 2 )`

`= 18 . 100 = 1800`

`c)`

`91 . 51 + 49 . 163 - 49 . 72`

`= 91 . 51 + 49 . ( 163 - 72 )`

`= 91 . 51 + 49 . 91`

`= 91 . ( 51 + 49 )`

`= 91 . 100 = 9100`

`e)`

`37 . 14 + 37 . 16 + 30 . 63`

`= 37 . ( 14 + 16 ) + 30 . 63`

`= 37 . 30 + 30 . 63`

`= 30 . ( 37 + 63 )`

`= 30 . 100 = 3000`

`g)`

`6 . 2 : 3 + 4 . 25 - 2 . 2`

`= 2 . 3 . 2 : 3 + 4 . 25 - 2 . 2`

`= 2 . 2 + 4 . 25 - 2 . 2`

`= 4 . 25 + 2 . ( 2 - 2 ) = 100 + 2 . 0 = 100`

`i)`

`341 . 67 + 341 . 16 + 359 . 83`

`= 341 . ( 67 + 16 ) + 359 . 83`

`= 341 . 83 + 359 . 83`

`= 83 . ( 341 + 359 )`

`= 83 . 700`

`= 58100`

#tn