Doubling and Halving - instructional PowerPoints

These PowerPoints are designed to aid the teaching of doubling and halving.
They show a method (partitioning) that will be helpful when doubling or halving any number. They focus on two digit numbers (including decimals involving tenths) and three digit numbers.
The tricky subject of halving three digit numbers with odd numbers of tens is covered with the suggestion of a ‘trick’ to overcome the difficulty.
In each case, there are a number of examples with which to practise the method - ideal for whole-class whiteboard exercises.
The examples increase in difficulty where possible.

I hope you find these useful. If you do, please post a review so that others know they are worth downloading.