New
New
Year 3

Use parts and wholes to find a unit fraction of a set of objects

I can use knowledge of parts and wholes to find a unit fraction of a set of objects.

New
New
Year 3

Use parts and wholes to find a unit fraction of a set of objects

I can use knowledge of parts and wholes to find a unit fraction of a set of objects.

Share activities with pupils
Share function coming soon...

Lesson details

Key learning points

  1. The whole can be a set of objects.
  2. To identify the size of a part, we can divide the whole amount by the number of parts.
  3. To identify the size of the whole, we can multiply the number of equal parts by the size of each part.
  4. ‘The whole is divided into ___ equal parts. Each equal part is __________ of the whole.'

Common misconception

Children may struggle to make the connection between the unit fraction and the division required.

The stem sentence, 'The whole is divided into ___ equal parts. Each equal part is __________ of the whole.' supports children to grasp this. Support children to make connections between the number of equal parts and the denominator of the fraction.

Keywords

  • Set - A set is a collection of things (objects or numbers).

  • Unit fraction - A unit fraction is any fraction where the numerator is one.

Lots of practical experience using number rods will help children to grasp this concept. Use examples including times table facts that children are confident with to reduce the cognitive load.
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).

Video

Loading...

6 Questions

Q1.
A whole set of cars is:
Correct answer: all of them
some of them
Q2.
What is the whole amount of lemons shown?
An image in a quiz
Correct Answer: 7, seven
Q3.
Match the division expressions with their quotient.
Correct Answer:12 ÷ 2 = ,6

6

Correct Answer:15 ÷ 5 = ,3

3

Correct Answer:20 ÷ 4 =,5

5

Correct Answer:20 ÷ 10 =,2

2

Correct Answer:32 ÷ 8 = ,4

4

Q4.
Look at this table, and complete the missing section. What is the part as a fraction of the whole?
An image in a quiz
Correct answer: one-half
one-third
one-quarter
Q5.
Who has the most marbles in their whole set?
An image in a quiz
Correct Answer: Lucas
Q6.
Which whole line is longer?
An image in a quiz
Correct Answer: Line B, B, b

6 Questions

Q1.
Which of these fractions are unit fractions?
An image in a quiz
Correct answer: A
B
Correct answer: C
D
Q2.
How many equal parts has the whole set of cherries been divided into?
An image in a quiz
Correct answer: 4
5
20
one-quarter
Q3.
What fraction of the whole is each part?
An image in a quiz
one-half
one-third
Correct answer: one-quarter
one-fifth
Q4.
How many cherries are in each part?
An image in a quiz
Correct Answer: 5, five
Q5.
Lucas has 5 pears. This is one-third of the bag of pears. How many pears are in the whole bag?
Correct Answer: 15, fifteen
Q6.
Sofia has 8 counters. This is one-quarter of the bag of counters. How many counters are in the whole bag?
Correct Answer: 32, thirty-two, thirty two