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

• 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).

## Starter quiz

### 6 Questions

Q1.
What is 3 + 3 + 1?
5
6
8
Q2.
What is the sum of the three dice?
9
10
13
Q3.
What is the missing number?
1
3
4
Q4.
What is the sum of 3 + 4 + 2?
6
7
8
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?
5
7
8

## Exit quiz

### 6 Questions

Q1.
What is the sum of 3 + 3 + 1?
5
6
Q2.
What is the sum of the numbers in the bar model?
6
7
9
Q3.
What is the sum of the numbers in the bar model?
8
10
11
Q4.
2
4
5
Q5.
What number is missing from this equation?
1