Year 4 - Maths
Scale known multiplication facts by 100
Understand what happens when a number is multiplied or divided by 10 and 100
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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 explain the relationship between multiplying and dividing a number by 10 and multiples of 10.
Lesson Summary
You will learn to scale known multiplication facts by 100.
Key Notes
- If one factor is made one hundred times the size, the product will be one hundred times the size.
- One factor has been multiplied by 100 so the product is multiplied by 100
- When multiplying two numbers, if either factor is made 100 times the size, the product will be 100 times the size.
- 6 multiplied by 300 is equal to 600 multiplied by 3 or 6 hundreds multiplied by 3
Vocabulary To Learn
- Scaling: Scaling is when a given quantity is made ___ times the size.
- Factor: A factor is a number which exactly divides another whole number.
- Product: A product is the result of two or more numbers multiplied together.
Common Mistakes To Avoid
- Times tables recall is crucial in these lessons. It provides the platform for children to extend their understanding in combination with what they know about place value.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
If one factor is made one hundred times the size, the product will be one hundred times the size. One factor has been multiplied by 100 so the product is multiplied by 100.
2. Use this key word in a maths sentence and explain it clearly. 'Scaling'
Scaling is when a given quantity is made ___ 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: Times tables recall is crucial in these lessons. It provides the platform for children to extend their understanding in combination with what they know about place value. Correction: For children who struggle with times table recall, give them a times table grid to refer to. This lesson is teaching the concept of scaling, not testing their knowledge of times tables.
More Lessons In This Unit
- Explain how making a factor 10 times the size affects the product Study Guide
- Explain how making a factor 100 times the size affects the product Study Guide
- Explain how making the dividend 10 times the size affects the quotient Study Guide
- Explain how making the dividend 100 times the size affects the quotient Study Guide
- Explain the relationship between multiplying a number by 10 and multiples of 10 Study Guide
- Explain the relationship between multiplying a number by 100 and multiples of 100 Study Guide
- Explain the removal of placeholders when dividing whole numbers by 100 Study Guide
- Explain the use of placeholders when multiplying whole numbers by 100 Study Guide
- Scale division facts derived from multiplication facts by 100 Study Guide
- Understand that dividing a number by 10 makes it one-tenth times the size Study Guide
- Understand that multiplying by 10 makes a number ten times the size Study Guide
- Use knowledge of the composition of 100 to multiply and divide by 100 in different ways Study Guide
- Use place value to explain placing a zero after the final digit when we multiply whole numbers by 10 Study Guide
- Use place value to explain removing the zero in the ones from a multiple of ten when we divide by 10 Study Guide
Browse all guides in the Year 4 Maths guide library.