Demonstration: expanded column addition

Demonstration: expanded column addition

Year 3 have been learning expanded column addition - before they move on to the standard compact method.

They were all very keen to record their tutorials!

Here, F & L demonstrate: partitioning into 100s, 10s and 1s; 'doing the 1s number 1' (adding the units first) and using number facts ('...we know 5 + 4 = 9, so 50 + 40 is 90: ten times bigger!).

By Thomas Frost on April 26th, 2017

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