New
New
Year 3

Add 3 numbers together using doubles and near doubles

I can use doubles and near doubles to add three numbers.

New
New
Year 3

Add 3 numbers together using doubles and near doubles

I can use doubles and near doubles to add three numbers.

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Lesson details

Key learning points

  1. Addition of 3 addends can be described by an aggregation story with 3 parts.
  2. Number facts to 10 can help to add three small numbers.
  3. Doubles and near doubles can help to add three small numbers together.

Common misconception

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.

Keywords

  • 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.

Pupils may find tens frames helpful in adding three addends. This is particularly useful in visualising the addition of doubles and near doubles.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
What is double 3?
4
Correct answer: 6
8
Q2.
What is the total of the spots on the two dice?
An image in a quiz
Correct answer: 8
10
12
Q3.
What is the missing number in this equation?
An image in a quiz
2
Correct answer: 3
4
5
Q4.
Alex doubles a number and gets the answer 12. What number did he double?
5
Correct answer: 6
7
Q5.
Izzy uses the same number twice to complete this equation. What number did she use?
An image in a quiz
6
7
Correct answer: 8
9
Q6.
Which calculation gives the same answer as 6 + 7?
6 + 6 + 2
7 + 7 + 1
Correct answer: 6 + 6 + 1
7 + 6 + 1

6 Questions

Q1.
What is the sum of the dots on the three dice?
An image in a quiz
12
13
Correct answer: 14
15
Q2.
What is the sum of the three dice?
An image in a quiz
Correct Answer: 15, fifteen
Q3.
Which equations contain a near double?
Correct answer: 8 + 4 + 5
Correct answer: 6 + 2 + 7
9 + 2 + 5
8 + 1 + 6
Q4.
True or false? 9 + 9 + 2 = 10 + 10
Correct answer: True
False
Q5.
What is the missing number?
An image in a quiz
Correct Answer: 2, two
Q6.
The missing numbers both have the same value. What is that value?
An image in a quiz
4
5
6
Correct answer: 7