Scale known multiplication facts by 100
Lesson details
Learning outcome
I can scale known multiplication facts by 100
Key learning points
- 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
Keywords
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 misconception
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.
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.
Teacher tip
Some of your pupils may want to know what happens when both factors are scaled up. Don't dismiss this if it comes up but be reminded that this may overcomplicate calculations for the whole class. Explain that this is something for future learning but excellent conjecture and pattern spotting.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of the numbers in the following equation are factors? 40 × 7 = 280
Q2.Match the times table expression with the correct product.
84
42
88
81
Q3.Which of these times table facts is being shown by the array?
Q4.Match the expressions showing commutativity.
40 × 5
8 × 90
60 × 3
4 × 20
Q5.Tick the expressions that this array is showing.
Q6.True or false? To multiply a whole number by 100, you add two zeros.
Assessment exit quiz
6 Questions
Q1.What is the missing factor in the multiplication shown? 4 × = 400
Q2.Which of the following statements describes the image below?
Q3.Tick the multiplication equations being shown by the array.
Q4.5 × 900 =
Q5.1,200 × 7 =
Q6.Sofia is carrying boxes of sauce sachets into the school kitchen. Each box contains 600 sachets. She carries in 8 boxes. How many sachets is that in total? sachets
To help you plan your 4 maths lesson on: Scale known multiplication facts by 100, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 4 maths lesson on: Scale known multiplication facts by 100, 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.