Year 4 - Maths
Use place value and number facts to decompose 4-digit numbers in different ways
Comparing, ordering and rounding 4-digit numbers
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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 compare and order 4-digit numbers. They will learn what rounding is and will round 4-digit numbers to the nearest thousand, hundred and ten.
Lesson Summary
You will learn to partition and decompose 4-digit numbers in different ways.
Key Notes
- Place value counters can represent 4-digit numbers
- Each digit in a 4-digit number represents a different column value.
- A part-whole model can represent 4-digit numbers partitioned in different ways.
Vocabulary To Learn
- Partition: The act of splitting an object or value down into smaller parts
Common Mistakes To Avoid
- Zero is a tricky concept for some pupils when it comes to place value. For example, pupils might struggle to read and understand the number 2,087, or struggle to express in numbers a representation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Place value counters can represent 4-digit numbers. Each digit in a 4-digit number represents a different column value.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
The act of 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: Zero is a tricky concept for some pupils when it comes to place value. For example, pupils might struggle to read and understand the number 2,087, or struggle to express in numbers a representation. Correction: Blank place value grids are an excellent scaffold. Give pupils ample opportunities to explore using them both with concrete resources such as counters and with numerals, practising reading and writing the number.
More Lessons In This Unit
Browse all guides in the Year 4 Maths guide library.