Question

90 . 210 + 10 . 210

Answer 1

90 . 210 + 10 . 210

= ( 90 + 10 ) . 210

= 100 . 210

= 21000

k mk đi          

Answer 2

90 . 210 + 10 . 210

= 210 . ( 90 + 10 )

= 210 . 100

= 21000

Answer 3

90 x 210 + 10 x 210 

=18900 + 2100

=21000

k nha

Answer 4

90 . 210 + 10 . 210

= ( 90 + 10 ) . 210

= 100 . 210

= 21 000

Answer 5

90 . 210 + 10 . 210

= ( 90 + 10 ) . 210

= 100 . 210

= 21 000

Answer 6

90.210+10.210

=210.(90+10)

=210.100

=21000

k mik nha ^-^

Answer 7

= 210.(10+90)

= 210.  100

=   21000

Answer 8

90.210+10.210

=(10+90).210

=100.210

=21000

Answer 9

\(90.210+10.210\)

\(=210.\left(90+10\right)\)

\(=210.100\)

\(=21000\)