Ralph and side-kick Matrix have more questions to consolidate mental maths skills. The focus of this quiz is multiplication. Before taking part in the quiz make sure you have a pencil or pen and a ...

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, ...