In Maths we will be completing week 9 of the NCETM's Mastering Number programme, which continues our work on composition.
This week, the children will build on their understanding of the composition of numbers by investigating the composition of 3, 4 and 5. Composing and de-composing numbers involves the children investigating part–part–whole relations, e.g. seeing that 3 can be composed of 1 and 2. Through practical experience, they will consolidate their understanding of a whole being made up of smaller parts. They will begin to recognise that numbers can be made by combining parts in different ways. A key focus will be the spatial arrangements that can be made with different combinations of the same number of objects.
The children will have experience of subitising small quantities and will use their skills to identify the numbers within 5. They will have previously made towers of blocks in different ways, and will begin to recognise that 3, 4 and 5 can be made by combining parts in different ways. When the children can compose and flexibly de-compose numbers mentally, they will become more fluent in their knowledge of number bonds and they can use these to become efficient when calculating in KS1 and KS2.