Question

thuc hien phep tinh:-39.(5-99)+99.(10-39) hay giai ra cho minh nhe

Answer 1

-39 x ( 5 - 99 ) + 99 x ( 10 - 39 )

= -39 x 5 - 39 x ( -99 ) + 99 x 10 - 99 x 39

=  -39 x 5 + [ 39 x 99 - 99 x 39 ] + 99 x 10

= -39 x 5 + 99 x 10

= -39 x 5 + 198 x 5

= 5 x ( -39 + 198 )

= 5 x 159

= 795

Answer 2

-39.(5-99)+99.(10-39)

=-39.(-94)+99.(-29)

=3666+(-2871)

=795