Year 4 - Maths
Round a 4-digit number to the nearest hundred and ten
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 use place value to round a 4-digit number to the nearest hundred and the nearest ten.
Key Notes
- Identify the next and previous multiples of 10 or 100 to the number on a number line.
- Rounding to the nearest 100, look at the tens value to decide whether to round to the previous or next multiple of 100
- Rounding to the nearest 10, look at the ones value to decide whether to round to the previous or next multiple of 10
- If the value of the digit you are looking at is 5 or more you round to the next multiple.
Vocabulary To Learn
- Rounding: Making a number simpler but keeping its value close to what it was.
- Multiple: The result of multiplying a number by an integer. For example, multiples of 100 are 100, 200, 300, 400 etc.
Common Mistakes To Avoid
- A tricky digit for many pupils to consider is 0 because the rounded number is often the same as the original number. Pupils are often tempted to round to the multiple before the one they should.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Identify the next and previous multiples of 10 or 100 to the number on a number line. Rounding to the nearest 100, look at the tens value to decide whether to round to the previous or next multiple of 100.
2. Use this key word in a maths sentence and explain it clearly. 'Rounding'
Making a number simpler but keeping its value close to what it was. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: A tricky digit for many pupils to consider is 0 because the rounded number is often the same as the original number. Pupils are often tempted to round to the multiple before the one they should. Correction: Spend some time establishing with pupils that occasionally when zeroes are involved, the number does not actually change when it is rounded. Number lines are a great visual support when rounding, including in this aspect.
More Lessons In This Unit
Browse all guides in the Year 4 Maths guide library.