Year 3 - Maths
Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25
Representing 3-digit numbers, comparing and positioning on number lines
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Study Guides
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 solve problems by counting in multiples of 2, 20, 5, 50 and 25.
Key Notes
- Scales are marked in different ways.
- Counting in 20s, 50s or 25s can help identify missing numbers.
- Knowing patterns can help you recognise whether numbers are multiples of 20, 25 or 50
Vocabulary To Learn
- multiple: A multiple is the result of multiplying a number by another whole number.
- pattern: A pattern is when objects or numbers are arranged following a rule. A pattern is a repeated set of numbers, shapes or objects.
Common Mistakes To Avoid
- Pupils may struggle to find missing numbers where they are given the start and end numbers only.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Scales are marked in different ways. Counting in 20s, 50s or 25s can help identify missing numbers.
2. Use this key word in a maths sentence and explain it clearly. 'multiple'
A multiple is the result of multiplying a number by another whole number. 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 to find missing numbers where they are given the start and end numbers only. Correction: Draw attention to the patterns in the counts (e.g. 5 and 0 of counting in 5s and 50s) so that pupils recognise multiples of numbers.
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
- Partition 3-digit numbers in different ways 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
- 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.