Question

a) 1135.(-24)+(-24).(-135)

b) - 54.38+12.(-54)-50.(-54)

c) 19-42.(-19)+38.5

Answer 1

a) 1135.(-24)+(-24).(-135)

=  ( - 24 ) . ( 1135 + -135 )

=  -24 . 1000

= -24000

b) - 54.38+12.(-54)-50.(-54)

= - 54 . ( 38 + 12 - 50 )

= -54 . 0

= 0

c) 19-42.(-19)+38.5

=   19 -  (- 789 ) + 280 

= 808 + 280

= 1088

Answer 2

a)1135.(-24)+(-24).(-135)

=(-24).[1135+(-135)]

=(-24).1000

=-24000

b)-54.38+12.(-54)-50.(-54)

=(-54).(38+12-50)

=(-54).0

=0

c)19-42.(-19)+38.5

=19.[1-(-42]+38.5

=19.43+190

=817+190

=1007

Answer 3

a) 1135 . (-24) + (-24)  . ( - 135 )

  = (-24). [ 1135 + ( - 135 )

  = (-24) . 1000 = -24000

b) -54 . 38+12.(-54)  -50.(-54)

    = -54 . [  38 + 12 - 50 ]

    = -54  . 0 = 0

c) 19-42.(-19)+38.5

     = 19  -42.(-19)  +  19.2 .5

     =19-42.(-19) + 19.10

     = 19 -  (-42) . 19 + 19 .10

     = 19 - 19 . [  (-42) + 10 ]

    = 0 . ( - 30) 

    =0 

k nha !