The array can be shown as 5 groups of 3 showing that 5 x 3 = 15. Or it could be shown as 3 groups of 5 showing that 3 x 5 = 15. This demonstrates that multiplication is commutative. Image caption, ...

Division is used when sharing a number into another number. Division is the opposite of multiplying. The array method uses a rectangular grid for multiplication and division. Division can be used when ...