Here are some problems with words. They are not difficult, but they should worked out 'in your head' as quickly as possible and be prepared to tell your teacher or parent how you did them.

Start by subtracting 0.9 from numbers and then move on to adding or subtracting 1.9, 2.9 using the same technique.

Complete subtraction sentences using mental methods only.

Plenty of practice subtracting tens of millions mentally.