Year 3 - Maths
Scale known multiplication facts by 10
2, 4 and 8 times tables: using times tables to solve problems
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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 solve multiplication and division problems using knowledge of the scaling relationships between the 2-, 4- and 8-times tables.
Lesson Summary
You will learn to use unitising and multiplying by 10 to scale multiplication facts.
Key Notes
- If two groups of 4 are equal to 8 then two group of 4 tens is equal to 8 tens or 80
- By thinking of a number of 10s, you can scale up and work out the 20, 40 and 80 times tables
- By thinking of a number of 10s, you can scale up and work out ten times the 2, 4 and 8 times tables
Vocabulary To Learn
- Scale / scaling: Scaling is when a given quantity is made ___ times the size. In this lesson, scaling will involve making values 10 times the size.
Common Mistakes To Avoid
- Lack of fluency in multiplication facts and / or understanding of word problems. 'Adding a 0' at the end.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
If two groups of 4 are equal to 8 then two group of 4 tens is equal to 8 tens or 80. By thinking of a number of 10s, you can scale up and work out the 20, 40 and 80 times tables.
2. Use this key word in a maths sentence and explain it clearly. 'Scale / scaling'
Scaling is when a given quantity is made ___ times the size. In this lesson, scaling will involve making values 10 times the size. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Lack of fluency in multiplication facts and / or understanding of word problems. 'Adding a 0' at the end. Correction: Use language of unitisation to support pupils mathematical thinking. Clear modelling of steps in how to find the operation for the calculation. Use gattegno chart or place value chart to highlight scaling by 10.
More Lessons In This Unit
- Explain the relationship between adjacent multiples of eight Study Guide
- Explain the relationship between adjacent multiples of four Study Guide
- Explain the relationship between multiples of 2 and multiples of 4 Study Guide
- Explain the relationship between multiples of 4 and multiples of 8 Study Guide
- Explain the relationship between the multiples of 2, 4 and 8 Study Guide
- Represent counting in eights as the 8 times table Study Guide
- Represent counting in fours as the 4 times table Study Guide
- Scale divisions derived from multiplication facts by 10 Study Guide
- Use knowledge of the 4 times table to solve problems Study Guide
- Use knowledge of the divisibility rules for divisors 8 to solve problems Study Guide
- Use knowledge of the divisibility rules for divisors of 2 and 4 to solve problems Study Guide
- Use knowledge of the relationship between the 2 and 4 times tables to solve problems Study Guide
- Use knowledge of the relationship between the 2, 4 and 8 times tables to solve problems Study Guide
- Use knowledge of the relationship between the 4 and 8 times tables to solve problems Study Guide
Browse all guides in the Year 3 Maths guide library.