Year 3 - Maths
Partition 3-digit numbers in different ways
Representing 3-digit numbers, comparing and positioning on number lines
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will use knowledge of place value to represent a 3-digit number in different ways. They will compare and order 3-digit numbers and position on number lines and unmarked number lines.
Lesson Summary
You will learn to partition 3-digit numbers into 2 and 3 parts.
Key Notes
- Partitioning of 3-digit numbers can be represented using base ten blocks or bar models.
- 3-digit numbers can be partitioned into 2 or 3 parts in many different ways.
- Partititoning can be used to find missing parts or addends.
Vocabulary To Learn
- Partition: Partition means splitting an object or value down into smaller parts.
Common Mistakes To Avoid
- Pupils may struggle when partitioning hundreds and tens (e.g. partitioning 340 into 220 and 120).
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Partitioning of 3-digit numbers can be represented using base ten blocks or bar models. 3-digit numbers can be partitioned into 2 or 3 parts in many different ways.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
Partition means splitting an object or value down into smaller parts. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may struggle when partitioning hundreds and tens (e.g. partitioning 340 into 220 and 120). Correction: Give pupils opportunities to manipulate base ten blocks, rearranging them and partitioning both the hundreds and the tens.
More Lessons In This Unit
- Add and subtract to and from a 3-digit number bridging 100 Study Guide
- Comparing and ordering numbers with 1, 2 and 3 digits Study Guide
- Count forwards and backwards in multiples of 2, 20, 5, 50 and 25 Study Guide
- Count forwards and backwards within 3-digits Study Guide
- Estimate the position of 3-digit numbers on unmarked number lines Study Guide
- Ordering sets of 3-digit numbers Study Guide
- Position 3-digit numbers on number lines Study Guide
- Represent a 3-digit number up to 1,000 in different ways Study Guide
- Solve problems by adding and subtracting to or from 3-digit numbers Study Guide
- Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25 Study Guide
- Use known facts to add and subtract multiples of 100 within 1000 Study Guide
- Use known facts to add and subtract to and from multiples of 100 Study Guide
- Use known facts to solve problems involving partitioning numbers Study Guide
- Write a 3-digit multiple of 10 as a multiplication equation Study Guide
Browse all guides in the Year 3 Maths guide library.