Add 3 numbers together using doubles and near doubles | Maths

Starter quiz

What is double 3?
- 4
- 6 ✓
- 8
What is the total of the spots on the two dice?
- 8 ✓
- 10
- 12
What is the missing number in this equation?
- 2
- 3 ✓
- 4
- 5
Alex doubles a number and gets the answer 12. What number did he double?
- 5
- 6 ✓
- 7
Izzy uses the same number twice to complete this equation. What number did she use?
- 6
- 7
- 8 ✓
- 9
Which calculation gives the same answer as 6 + 7?
- 6 + 6 + 2
- 7 + 7 + 1
- 6 + 6 + 1 ✓
- 7 + 6 + 1

What is the sum of the dots on the three dice?
- 12
- 13
- 14 ✓
- 15
What is the sum of the three dice?
- '15' ✓
Which equations contain a near double?
- 8 + 4 + 5 ✓
- 6 + 2 + 7 ✓
- 9 + 2 + 5
- 8 + 1 + 6
True or false? 9 + 9 + 2 = 10 + 10
- True ✓
- False
What is the missing number?
- '2' ✓
The missing numbers both have the same value. What is that value?
- 4
- 5
- 6
- 7 ✓

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Pupils do not understand that addition is commutative and are unable to 'swap' addends around.

Use practical equipment and small numbers to show pupils that a sum is still the same even if values are added in different orders.

Double - Double means to become twice as many.
Equation - An equation is used to show that one number or calculation is equal to another.
Sum - The total when numbers are added together.