Year 5 - Maths
Multiply a 2-digit number by a 1-digit number using short multiplication (no 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 multiply a 2-digit number by a 1-digit number using short multiplication (no regroups).
Key Notes
- Short multiplication is another way of representing 2-digit by 1-digit multiplication.
- There are similarities between the representations of multiplication.
- Arranging the factors in columns allows you to organise the partial products into a column addition.
Vocabulary To Learn
- short multiplication: A way of recording using columns to set out and calculate a multiplication.
- factor: A number that divides exactly into another number.
Common Mistakes To Avoid
- When using the short method, pupils may not align the digits correctly with the same place value.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Short multiplication is another way of representing 2-digit by 1-digit multiplication. There are similarities between the representations of multiplication.
2. Use this key word in a maths sentence and explain it clearly. 'short multiplication'
A way of recording using columns to set out and calculate a multiplication. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: When using the short method, pupils may not align the digits correctly with the same place value. Correction: Continue to ask what each digit that has been recorded represents, linking back to the place value chart.
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 partitioning and representations (two 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.