Now for some quite tricky mental subtraction for Year 6 children. Working with 6 and 7 figure numbers to subtract is no easy task and the skills learnt in earlier years will be needed – for example counting on. One of the key aspects of this is to realise that a quick starting point for solving a subtraction such as 320,000 – 50,000 is to take 50 from 320 or even 5 from 32 and then adjusting to take account of the thousands. Why not try these now?Go to Year 6 Subtraction