Question

90 . 10 + 90 . 90

Answer 1

90 . 10 + 90 . 90

= 90 . ( 90 + 10 )

= 90 . 100

= 9000

Answer 2

90 . 10 + 90 . 90

= 90 . ( 10 + 90 )

= 90 . 100

= 9000

Answer 3

90.10+90.90

=90.(10+90)

=90.100

=9000

Answer 4

=900+8100

= 9000

Answer 5

  90 . 10 + 90 . 90

=90 . ( 10+90)

=90.100

=9000