Step 2 Objective
Develop and refine written methods for column addition and subtraction for two whole numbers less then 1000, and addition of more than two such numbers.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
What if pupils find this a barrier?
It can be helpful to give pupils some worked examples to mark and to identify mistakes.
At this stage pupils may have a variety of written methods;- ask them to compare methods and discuss which are more efficient.
Pupils may need to work towards column addition by using partial sums, e.g. 287 + 45:
See the other methods in FTM(P)Y456 p. 48 - Acrobat pdf document (34Kb) and FTM(P)Y456 p. 50 - Acrobat pdf document (31Kb).
It is important to build on pupils' mental strategies, so keep to informal written methods with pupils explaining what they are doing.
- TL4Y7 Number 1 N1.2, N1.3 - Acrobat pdf document (72Kb) is a very helpful resource.
For guidance on addition and subtraction refer to the document 'The National Numeracy Strategy: Teaching written calculations – guidance for teachers at key stages 1 and 2' (QCA/99/486) pp. 25-33.