Year 2 - Maths
Explain how groups of five and ten are related
Representing counting in 5s as the 5 times table and link to the 10 times tables
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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 represent the 5-times table in different ways. They will explain the relationship between adjacent multiples of 5 and how 5- and 10-times tables are related. 
Lesson Summary
You will learn to explain how groups of five and ten are related.
Key Notes
- Five is half of ten
- __ groups of 5 will be half __ groups of 10
- Ten is double 5
- __ groups of 10 will be double __ groups of 5
Vocabulary To Learn
- Related: The relationship between a set of values.
- Double: To become twice as many / to multiply by two.
- Half: One of two equal parts of a whole. / To divide into two equal parts.
Common Mistakes To Avoid
- Pupils may assume that multiples of 5 and 10 are multiples of 10
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Five is half of ten. __ groups of 5 will be half __ groups of 10.
2. Use this key word in a maths sentence and explain it clearly. 'Related'
The relationship between a set of values. 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 assume that multiples of 5 and 10 are multiples of 10. Correction: Show children the relationship between 5s and 10s using the multiplication chart and number line. Make clear that even multiples of 5 are multiples of 10 Not all multiples of 10 are multiples of 5 Encourage discussions to highlight the relationship.
More Lessons In This Unit
- Explain how a factor of zero or one affects the product Study Guide
- Explain how a multiplication equation with 2 as a factor is related to doubling Study Guide
- Explain the relationship between multiples of five and ten Study Guide
- Explain what each factor represents in a multiplication story Study Guide
- Explain what each factor represents in a multiplication story when one of the factors is one Study Guide
- Represent multiplication equations in different ways Study Guide
- Use knowledge of the 2, 5 and 10 times tables to solve problems Study Guide
- Use knowledge of the 2, 5 and 10 times tables to solve problems in a range of contexts Study Guide
- Use knowledge of the relationships between the 5 and 10 times tables to solve problems Study Guide
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