1. Addition Strategies Traditional Algorithm Act It Out Compensation
These are some of the strategies that 3rd grade students might use depending on their math understanding and ability to move from hands on to more abstract math (as in the traditional method).
Traditional Algorithm
Act It Out
Compensation
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Use Base 10 Blocks to show your addends. Combine them to find the sum.
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For example:
Think = 92
BUT because I added 1 to 39 to round up to 40 I need to subtract 1 from my answer.
So: 52 + (40 – 1) = 91
Draw a Picture: Base 10
Draw/Use a Number Line
Break Apart/Partial Sums

2. Traditional Algorithm (With Base 10 Blocks and a Mat)
Addition Strategies
Video Links: Click the strategy
name to link to an example.
Traditional Algorithm
Act It Out
(With Base 10 Blocks and a Mat)
Compensation
Draw a
Picture
(Base 10 Model)
Draw a
Picture
(Number Line)
Break Apart
(aka Partial Sums)