Understand that multiplying by 10 makes a number ten times the size
Lesson details
Learning outcome
I can understand that multiplying by 10 makes a number ten times the size.
Key learning points
- Finding ten times as many is the same as multiplying by 10
- 10 is ten times the size of 1
- A digit in the tens column is 10 times the value of a digit in the ones column.
Keywords
Scaling - Scaling is when a given quantity is made ___ times the size.
Multiple - A multiple is the product of a number and an integer.
Common misconception
10 times the size and 10 times as many are achieved through the same operation but they are different.
Use sticky-tack or plasticine. Create 10 blobs that are equal in length to 1 blob that has been stretched. Encourage the children to see that the value of their length is the same but one is made of countable objects whereas the other is stretched.
Teacher tip
Gattegno charts are a useful resource to have available throughout this lesson.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What number is being shown on the Gattegno chart?
Q2.Which of these numbers is a multiple of 10?
Q3.What is twice the size of 34?
Q4.What is three times the size of 12?
Q5.What is four times the size of 8?
Q6.Andeep has ten times as many marbles as Jun. If Jun has 5 marbles, how many does Andeep have?
Assessment exit quiz
6 Questions
Q1.Jun has a sticky-tack worm that he measures at 2 cm long. He stretches it to be three times the size. How long will it be now? cm
Q2.Match the quantities with the quantities that are ten times the size.
Q3.Which of the following operations should be used to find ten times the size?
Q4.Sofia has a slinky that she measures at 5 cm long. She stretches it to be ten times the size. How long will it be now? cm
Q5.What’s the multiplication being represented on this Gattegno chart?
Q6.True or false: 10 times as many and 10 times the size are the same.
To help you plan your 4 maths lesson on: Understand that multiplying by 10 makes a number ten times the size, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Understand that multiplying by 10 makes a number ten times the size, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Understand what happens when a number is multiplied or divided by 10 and 100 unit, dive into the full primary maths curriculum, or learn more about lesson planning.