Year 5 - Maths
Multiply a 2-digit number by a 1-digit number using partitioning and representations (two regroups)
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 and place value equipment to represent multiplication.
Key Notes
- Place value resources can be used to represent multiplication of a 2-digit by a 1-digit number.
- Regroup from the ones to the tens if the product of the tens is greater than 10
- Regroup from the tens to the hundreds if the product of the tens is greater than 100
Vocabulary To Learn
- product: The result of two or more numbers multiplied together.
- regrouping: The process of unitising and exchanging between place values.
Common Mistakes To Avoid
- Pupils may not regroup correctly.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Place value resources can be used to represent multiplication of a 2-digit by a 1-digit number. Regroup from the ones to the tens if the product of the tens is greater than 10.
2. Use this key word in a maths sentence and explain it clearly. 'product'
The result of two or more numbers multiplied together. 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 regroup correctly. Correction: Encourage pupils to use the stem sentences / array to identify when they may need to regroup.
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 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 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.