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Add three addends by finding pairs that total 10

I can recognise number pairs that total 10 and use them to find the sum of three numbers.

Lesson 4 of 10

New

I can recognise number pairs that total 10 and use them to find the sum of three numbers.

Lesson slides

Rearranging the addends identifies the pairs that total 10.
Place value means we can add a single digit to 10.
Representations help us to see the pair that makes 10 and the extra ones number.

Addend - A number added to another.
Commutative - Addition is commutative. This means the order of the addends can be changed without changing the calculation or sum.
Equation - An equation is used to show that one number or calculation is equal to another.
Sum - The sum is the total when numbers are added together.

Pupils believe a pair to 10 only exists if the addends are next to one another in an equation.

Addition is commutative. Model the use of tens frames to show efficient addition of calculations containing number pairs to 10.

Tens frames help pupils understand and use number pairs that total ten. These can also be useful for representing problems with missing addends.

Teacher tip

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