Multiplication of numbers
Given: 9 × 10 = 90
9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 90
Or 10 × 9 = 90
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90
Additional Knowledge: In elementary grades we use this sign ( × ) as multiplication but if you were high school student the multiplication sign will be like this ( . ) a dot.
Just memorize the multiplication table/chart to solve a problem involving multiplication of numbers
If you have any questions or clarifications regarding my answer,don't hesitate to ask it.
-Anne
