New
New
Year 3

Add 3 numbers together in different contexts

I can represent addition problems using ‘first, then, then, now’ and bar models.

New
New
Year 3

Add 3 numbers together in different contexts

I can represent addition problems using ‘first, then, then, now’ and bar models.

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Lesson details

Key learning points

  1. Addition of three addends can be described with a first …, then …, then …, now structure.
  2. A bar model can be used to represent a problem with three addends.
  3. A number line can be used to represent a problem with three addends.

Common misconception

Pupils may not be confident in representing addition problems using bar models.

Make connections between bar models, tens frames and 'first...then...then...now' representations. Take time to model examples.

Keywords

  • Addend - A number added to another number.

  • Sum - The total when numbers are added together.

Tens frames, bar models and 'first...then...then...now' can be used to represent addition with three addends. Encourage pupils to use manipulatives alongside their own drawn representations.
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 3 + 3 + 1?
5
6
Correct answer: 7
8
Q2.
What is the sum of the three dice?
An image in a quiz
9
10
Correct answer: 11
13
Q3.
What is the missing number?
An image in a quiz
1
Correct answer: 2
3
4
Q4.
What is the sum of 3 + 4 + 2?
6
7
8
Correct answer: 9
Q5.
Match the calculations to the correct sum.
Correct Answer:4 + 4 + 3 =,11

11

Correct Answer:6 + 6 + 1 =,13

13

Correct Answer:5 + 5 + 2 =,12

12

Correct Answer:4 + 5 + 5 =,14

14

Q6.
The missing numbers both have the same value. What is that value?
An image in a quiz
5
Correct answer: 6
7
8

6 Questions

Q1.
What is the sum of 3 + 3 + 1?
5
6
Correct answer: 7
Q2.
What is the sum of the numbers in the bar model?
An image in a quiz
6
7
Correct answer: 8
9
Q3.
What is the sum of the numbers in the bar model?
An image in a quiz
8
Correct answer: 9
10
11
Q4.
What is the missing addend?
An image in a quiz
2
Correct answer: 3
4
5
Q5.
What number is missing from this equation?
An image in a quiz
1
Correct answer: 2
3
4
Q6.
Alex chooses 3 of the number cards and adds them together. Which 3 cards did he choose if he gets a sum of 12?
An image in a quiz
6 and 5 and 4
6 and 5 and 3
6 and 4 and 3
Correct answer: 5 and 4 and 3

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