New
New
Year 2

Use knowledge of the 5 and 10 times tables to solve problems

I can use knowledge of the 5 and 10 times tables to solve problems.

New
New
Year 2

Use knowledge of the 5 and 10 times tables to solve problems

I can use knowledge of the 5 and 10 times tables to solve problems.

Lesson details

Key learning points

  1. 10 is double 5, so when the products are the same, the factor × 10 is half of the factor × 5
  2. When we multiply the same factor by 5 and 10, the product of the factor × 10 is double the product of the factor × 5
  3. 5 is half of 10, so when the products are the same, the factor × 5 is double the factor × 10
  4. When we multiply the same factor by 5 and 10, the product of the factor × 5 is half of the product of the factor × 10

Common misconception

Children may incorrectly double or halve to find the missing products or factors.

The use of counters or visuals will help children to see the relationship between 10 and 5 in each context and support them to know when they must use doubling and when they must use halving.

Keywords

  • Product - A product is the result of two or more numbers multiplied together.

  • Factor - A factor is a number which exactly divides another whole number.

  • Double - To become twice as many / to multiply by two.

  • Half - One of two equal parts of a whole. To divide into two equal parts.

When describing related facts, use the sentence, 'If I know..., then I know...' to encourage children to continue to draw upon the relationship between the 5 and 10 times tables to help them identify missing factors or products more easily.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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6 Questions

Q1.
Double 20 is ___
An image in a quiz
35
Correct answer: 40
45
Q2.
Double 25 is ___
An image in a quiz
40
45
Correct answer: 50
55
Q3.
Half of 50 is ___
An image in a quiz
5
15
20
Correct answer: 25
Q4.
Fill in the missing number: 4 x 5 = 20 ___ x 10 = 20
An image in a quiz
Correct answer: 2
3
4
6
Q5.
How many fives will be equal to 4 tens?
An image in a quiz
5
6
7
Correct answer: 8
Q6.
How many fives will be equal to 5 tens?
Correct answer: 10
8
6
4

6 Questions

Q1.
Match each of the problems to their answers.
Correct Answer:How many fives are equal to 6 tens?, 12 fives

12 fives

Correct Answer:How many tens are equal to 6 fives? ,3 tens

3 tens

Correct Answer:How many tens are equal to 8 fives?,4 tens

4 tens

Q2.
Find the missing product.
An image in a quiz
15
30
45
Correct answer: 60
Q3.
It costs £5 for children and £10 for adults to ride the Ferris Wheel. Today, only adults went on the ride. The ride made £70 How many adults rode the Ferris Wheel? adults
An image in a quiz
Correct Answer: 7
Q4.
It costs £5 for children and £10 for adults to ride the Ferris Wheel. Yesterday, only children rode the Ferris Wheel. The ride made £60 How many children rode the Ferris Wheel? children.
An image in a quiz
Correct Answer: 12
Q5.
Jacob had 4 balls and threw them all in the ‘5 points’ basket. What was his score?
An image in a quiz
Correct Answer: 20
Q6.
Sofia got 2 balls in the ‘5 points’ basket’ and 2 balls in the ‘10 points’ basket. What was her score?
40
20
Correct answer: 30
50