Question

8x9+9x2+9x15-9x14-9

Answer 1

8x9+9x2+9x15-9x14-9

=9x(8+2+15-14-1)

=9x10

=90

Answer 2

8 x 9 + 9 x 2 + 9 x 15 - 9 x 14 - 9

=  8 x 9 + 9 x 2 + 9 x 15 - 9 x 14 - 9 x 1

=  9 x ( 8 + 2 + 15 - 14 -1 )

=  9 x         10

=  90

Answer 3

Đáp số: 90

Answer 4

8*9+9*2+9*15-9*14-9

=9(8+2+15-14-1)

=9*10

=90

vay...