Methods of Subtraction: Linking Methods

  • Lesson 3 of 5

Year 4

KS2

SKU: M4IL80773

This lesson will help your class to transition from the informal decomposition method to formal column subtraction, checking in on the expanded method along the way! They will start by comparing the decomposition and expanded method, noticing that it is the same process in a different layout. They will then have a look at the formal column subtraction method, noting that this is very similar to the expanded method. They will then be challenged to solve subtraction methods using any one of the three methods they have looked at. There is also the opportunity for them to 'be the teacher' as they mark some calculations that have been solved using the three methods to see if their eagle eyes can spot any mistakes!
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