1 Composition and decomposition
 Pause for thought Think back to when you last taught addition and subtraction algorithms. Think in particular about any students who were not finding it easy to understand what to do. Try to remember what was getting in the way of their understanding. |
Decomposition is an important concept for students to understand when they are learning to add and subtract numbers. First students must have a clear idea of how numbers are composed.
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What you can learn in this unit