Step 3 Objective
Find differences by counting up through next multiple of 10, 100 or 1000, e.g. calculate mentally a difference such as 8006 – 2993.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Examples of what pupils should know and be able to do
Work out mentally that:
4005 – 1997 = 2008 because it is
4005 – 2000 + 3 = 2005 + 3 = 2008
Work out mentally by counting up from the smaller to the larger number:
8000 – 2785 is 5 + 10 + 200 + 5000 = 5215