Add three addends by finding pairs that total 10 | Maths

Starter quiz

Which calculation has the same sum as 3 + 4 + 5?
- 4 + 3 + 3
- 6 + 3 + 4
- 5 + 4 + 3 ✓
- 4 + 3 + 4
What is the sum of the numbers in the bar model?
- 7
- 8
- 9
- 10 ✓
What addend is missing from the bar model?
- 1
- 2
- 3 ✓
- 4
Which number makes this equation correct?
- '1' ✓
What number is added to 7 to make 10?
- 3 ✓
- 4
- 5
- 7
Which pairs of dice show a total of ten dots?

What equation do the tens frames represent?
- 5 + 5 + 3 = 13
- 7 + 3 + 3 = 13
- 5 + 4 + 4 = 13
- 6 + 4 + 3 = 13 ✓
Which calculations include number pairs that total 10?
- 5 + 4 + 4
- 6 + 3 + 2
- 3 + 7 + 2 ✓
- 8 + 1 + 2 ✓
Match the equation to the correct sum.
- 8 + 2 + 1
  
  ⇔
  
  11 ✓
- 8 + 2 + 4
  
  ⇔
  
  14 ✓
- 2 + 3 + 8
  
  ⇔
  
  13 ✓
- 2 + 8 + 2
  
  ⇔
  
  12 ✓
What is the sum of the numbers in the bar model?
- 15
- 16 ✓
- 18
- 19
Find the missing addend in the equation.
- 4 ✓
- 5
- 6
- 11
What addend is missing from this bar model?
- 3
- 7 ✓
- 9
- 12

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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.

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.

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.