Question

12 x 56 x 2 + 6 x 14 x 4 + 3 x 30 x 8

Answer 1

12 x 56 x 2 + 6 x 14 x 4 + 3 x 30 x 8

= ( 12 x 2 ) x 56 + ( 6 x 4 ) x 14 + ( 3 x 8 ) x 30

= 24 x 56 + 24 x 14 + 24 x 30

= 24 x ( 56 + 14 + 30 )

= 24 x 100

= 2400

và.....

12 x 56 x 2 + 6 x 14 x 4 + 3 x 30 x 8

= 24 x 56 + 24 x 14 + 24 x 30

= 24 x 100

= 2400.( cách này gọn hơn chút )

Answer 2

..........

= ( 12 . 2 ) . 56 + ( 6 . 4 ) . 14 + ( 3 . 8 ) . 30

= 24 . 56 + 24 . 14 + 24 . 30

= 24 . ( 56 + 14 + 30 )

= 24 . 100

= 2400