## Subtraction in year 5 (age 9-10)

A key aspect of subtraction in year 5 is to, ‘subtract numbers mentally with increasingly large numbers’. Of course, there comes a point where it is much more sensible to use written methods of subtraction, but it is surprising what can be achieved by calculating ‘in your head’.

The standard written method should be used confidently, with crossing both the hundreds and tens boundaries.