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, ...

Multiplying an entire Excel column by the results of a formula can be a little tricky, especially if the formula is complicated or subject to change. To simplify to process, use an absolute reference ...

Save guides, add subjects and pick up where you left off with your BBC account. 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 ...