New
New
Year 3

# Partition 3-digit numbers in different ways

I can partition 3-digit numbers into 2 and 3 parts.

New
New
Year 3

# Partition 3-digit numbers in different ways

I can partition 3-digit numbers into 2 and 3 parts.

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## Lesson details

### Key learning points

1. Partitioning of 3-digit numbers can be represented using base ten blocks or bar models.
2. 3-digit numbers can be partitioned into 2 or 3 parts in many different ways.
3. Partititoning can be used to find missing parts or addends.

### Common misconception

Pupils may struggle when partitioning hundreds and tens (e.g. partitioning 340 into 220 and 120).

Give pupils opportunities to manipulate base ten blocks, rearranging them and partitioning both the hundreds and the tens.

### Keywords

• Partition - Partition means splitting an object or value down into smaller parts.

Pupils will find base ten blocks invaluable in this lesson. Giving them opportunities to manipulate these will develop their flexibility in partitioning 3-digit numbers.
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 50 + 7?
Q2.
What is 100 + 50?
105
115
510
Q3.
What is value of the 3 in the number 347?
3
30
Q4.
What is value of the 5 in the number 453?
5
500
Q5.
200 + 200 =
Q6.
What part is missing from the bar model?

## Exit quiz

### 6 Questions

Q1.
Complete the calculation. 200 + ___ = 270
7
17
700
Q2.
Which two numbers can 230 be partitioned into?
110 and 130
110 and 110
120 and 120
Q3.
Calculate the missing part. 200 + + 40 = 340
Correct Answer: 100, hundred, one hundred
Q4.
What is the value of the missing part in the bar model?
Q5.
Match the equations to their correct sums.
Correct Answer:100 + 100 + 20 = ,220

220

Correct Answer:200 + 10 = ,210

210