Year 5 - Maths
Count tenths in different ways
Understand tenths as part of a whole, represent and calculate mentally
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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 describe, represent and order tenths as a decimal fraction. They will round a decimal number with tenths to the nearest whole number and calculate mentally with decimal numbers including tenths.
Lesson Summary
You will learn to count tenths in different ways.
Key Notes
- Tenths can be counted and represented with place value resources.
- Tenths can be counted and represented as decimals on a number line.
- Tenths can be counted and represented as fractions on a number line.
Vocabulary To Learn
- decimal number: A decimal number has a decimal point followed by digits that show the fractional part.
- decimal point: A decimal point is a small dot used in a number to separate the whole number from the fractional part.
Common Mistakes To Avoid
- Recording ten tenths as 0.10 rather than 1 or 1.0
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Tenths can be counted and represented with place value resources. Tenths can be counted and represented as decimals on a number line.
2. Use this key word in a maths sentence and explain it clearly. 'decimal number'
A decimal number has a decimal point followed by digits that show the fractional part. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Recording ten tenths as 0.10 rather than 1 or 1.0. Correction: Be sure to address this regularly with pupils whilst counting. Demonstrate the regrouping using place value counters to help.
More Lessons In This Unit
Browse all guides in the Year 5 Maths guide library.