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`