Year 5 - Maths
Multiply a 2-digit number by a 1-digit number using partitioning
Multiplication by partitioning leading to short multiplication (2 by 1-digit)
Study Hub
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 multiply a 2-digit number by a single-digit number using partitioning and representations using expanded multiplication and using short multiplication.
Lesson Summary
You will learn to use partitioning to organise multiplication.
Key Notes
- When you partition and multiply the ones and then the tens you get partial products.
- When you add the partial products you calculate the overall product.
- Partitioning helps you to organise multiplication.
Vocabulary To Learn
- Partial product: Any of the multiplication results we get leading up to an overall multiplication result.
Common Mistakes To Avoid
- Pupils may not record partitioned factors as tens and ones leading to incorrect calculation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When you partition and multiply the ones and then the tens you get partial products. When you add the partial products you calculate the overall product.
2. Use this key word in a maths sentence and explain it clearly. 'Partial product'
Any of the multiplication results we get leading up to an overall multiplication result. 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 not record partitioned factors as tens and ones leading to incorrect calculation. Correction: Encourage pupils to use the stem sentences to support their thinking. Use the language of ___ tens to support place value.
More Lessons In This Unit
- Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication Study Guide
- Multiply a 2-digit number by a 1-digit number using expanded multiplication (no regroups) Study Guide
- Multiply a 2-digit number by a 1-digit number using expanded multiplication (regrouping 10s to 100s) Study Guide
- Multiply a 2-digit number by a 1-digit number using expanded multiplication (regrouping 1s to 10s) Study Guide
- Multiply a 2-digit number by a 1-digit number using partitioning and representations (one regroup) Study Guide
- Multiply a 2-digit number by a 1-digit number using partitioning and representations (two regroups) Study Guide
- Multiply a 2-digit number by a 1-digit number using short multiplication (no regroups) Study Guide
- Multiply a 2-digit number by a 1-digit number using short multiplication (regrouping 10s to 100s) Study Guide
- Multiply a 2-digit number by a 1-digit number using short multiplication (regrouping 1s to 10s) Study Guide
Browse all guides in the Year 5 Maths guide library.