Question

78. ( - 99) + 99. ( - 22)

Answer 1

78.(-99)+ 99 .(-22)

= -99 .[ 78 + (-22) ]

= -99 .56

= -99 .56

= -5544

Answer 2

Trả lời :

78 . ( - 99 ) + 99 . ( - 22 )

= 78 . ( - 99 ) + ( - 99 ) . 22

= - 99 . ( 78 + 22 )

= - 99 . 100

= - 9900

Hok tốt

Answer 3

78. ( -99 ) + 99. ( -22 )

= ( -78 ). 99 + 99. ( -22 )

= 99. [ ( -78 ) + ( -22 ) ]

= 99. ( -100 ) = -9900

Answer 4

78 . ( - 99 ) + 99 . ( - 22 )

= 78 . ( - 99 ) + ( - 99 ) . 22

= - 99 . ( 78 + 22 )

= - 99 . 100

= - 9900

Answer 5

Ta có 

78.(-99)+99.(-22)

=78.(-99)+(-99).22

=(-99)(78+22)

=(-99).100

=-9900