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Addition - using Partial Sums Method

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Videos, stories and solutions to help Grade 2 and Grade 3 students learn about addition using partial sums.

How to add using Partial Sums Addition?
1. Starting from the left, add up the digits one column at a time.
2. Write down each partial sum.
3. Add all the partial sums to get the final sum.

Partial sums examples 3 digits + 3 digits
3 digits + 3 digits (part 1)

3 digits + 3 digits (part 2)
Partial Sums Addition the fast way
A new method of addition used in Everyday Math and the Common Core.

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