Question

Tính nhanh

(-131).(-25)+(-74).131-(-1).131

 

Answer 1

( -131 ) . ( -25 ) + ( -74 ) . 131 - ( -1 ) . 131

= 131 . 25 + ( -74 ) . 131 - ( -1 ) . 131

= 131 . [ ( 25 + ( -74 ) - ( -1 ) ]

= 131 . ( -50 )

= -6550

Answer 2

\(\left(-131\right)\left(-25\right)+\left(-74\right).131-\left(-1\right).131\)

\(=\left(-131\right)\left[\left(-25\right)+74-1\right]=\left(-131\right).48=-6288\)