Subtraction package for KS2 teaching and revision: whole class work

This is a collection of PowerPoints that teach, revise and/or practise subtraction by counting on, compensation or the ‘vertical’ method.
Some use whole number examples while others use decimals.
Some of the PowerPoints have teaching slides and advice within them while others assume the method has already been taught and simply provide an opprtunity to revise it. I hope the names make it clear which are which.

There is a degree of cross-over or repetition between the different PowerPoints about counting on, but that could be helpful where revision or consolidation is required.

Subtraction by counting on can be particularly useful when crossing number boundaries, often removing the need to borrow across several columns that the formal written method may require (e.g. 1006 - 997).

These are all original to me, not borrowed from elsewhere. I hope you find at least one of these files useful. If you do, please post an appropriate review so that others can see the benefit of them.