sum

• The process of combining collections of objects into a larger collection.
• This is the opposite of subtraction.
• Add, addition, plus and sum are interchangeable terms.



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Example

Combining a collection of things together:




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Download information sheets

• Addition: compensation strategy (another way to add) (PDF)
• Addition: jump strategy (another way to add) (PDF)
• Addition and subtraction mental strategies (doing maths in your head) (PDF)
• Split strategy (PDF)
• Addition: adding and subtracting vertically (and trading) (PDF)



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Addition using the jump strategy



 



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Addition using a hundreds chart



 



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Split strategy for addition



 



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Using the compensation strategy



 



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Vertical algorithm for addition



 



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Vertical algorithm for decimals: Addition



 



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MAB blocks



 



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MAB trading



 



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Ten frames



 



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Related words

• split strategy
• compensation strategy
• mental strategy
• jump strategy