12×(-47)+12×(-19)+(-66)×88

2 câu trả lời

`12×(-47)+12×(-19)+(-66)×88`

`= 12×[-47+(-19)]+(-66)×88`

`= 12×(-66)+(-66)×88`

`= (-66)×(12+88)`

`= (-66)×100`

`= -6600`

`12 xx ( -47 ) + 12 xx ( -19 ) + ( -66 ) xx 88`

`= 12 xx ( -47 - 19 ) + ( -66 ) xx 88`

`= 12 xx ( -66 ) + ( -66 ) xx 88`

`= ( -66 ) xx ( 12 + 88 )`

`= ( -66 ) xx 100`

`= -6600`