Scale known multiplication facts by 100 | Maths | Quizalize & Oak National Academy

Starter quiz

Which of the numbers in the following equation are factors? 40 × 7 = 280
- 40 ✓
- 7 ✓
- 280
Match the times table expression with the correct product.
- 12 × 7
  
  ⇔
  
  84 ✓
- 7 × 6
  
  ⇔
  
  42 ✓
- 8 × 11
  
  ⇔
  
  88 ✓
- 9 × 9
  
  ⇔
  
  81 ✓
Which of these times table facts is being shown by the array?
- 6 × 6 = 36
- 8 × 6 = 48
- 6 × 8 = 48
- 6 × 7 = 42 ✓
Match the expressions showing commutativity.
- 5 × 40
  
  ⇔
  
  40 × 5 ✓
- 90 × 8
  
  ⇔
  
  8 × 90 ✓
- 3 × 60
  
  ⇔
  
  60 × 3 ✓
- 20 × 4
  
  ⇔
  
  4 × 20 ✓
Tick the expressions that this array is showing.
- 50 × 6
- 3 × 80
- 4 × 70 ✓
- 70 × 3
- 8 × 50
True or false? To multiply a whole number by 100, you add two zeros.
- True
- False ✓

Exit quiz

What is the missing factor in the multiplication shown? 4 × ______ = 400
- '100' ✓
Which of the following statements describes the image below?
- 4 has been scaled up by 100 to become 400 ✓
- 4 has been scaled up by 10 to become 400
- 4 has been scaled down by 100 to become 400
- 4 has been scaled down by 10 to become 400
Tick the multiplication equations being shown by the array.
- 3 × 500 = 1,500 ✓
- 500 × 3 = 1,500 ✓
- 1,000 + 500 = 1,500
- 5 × 300 = 1,500 ✓
- 300 × 5 = 1,500 ✓
5 × 900 = ______
- '4,500' ✓
1,200 × 7 = ______
- '8,400' ✓
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
- '4,800' ✓

Worksheet

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Presentation

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Lesson Details

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

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.

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.