New
New
Year 5

Explain how finding a fraction of a quantity relates to multiplying by a unit fraction

I can explain how finding a fraction of a quantity relates to multiplying by a unit fraction.

New
New
Year 5

Explain how finding a fraction of a quantity relates to multiplying by a unit fraction

I can explain how finding a fraction of a quantity relates to multiplying by a unit fraction.

Lesson details

Key learning points

  1. Half of a number is the same as a half multiplied by the number.
  2. If half of 10 is 5 then 1/2 x 10 = 5
  3. Finding a fraction of a number is the same as multiplying the number by the fraction.

Common misconception

Pupils struggle to see the relationship between the different number rods.

Take time with pupils for them to explore the use of number rods if they have not done so before. You might ask pupils to find rods that are half the size of different coloured rods, so they can estimate sizes and draw attention to the relationship.

Keywords

  • Relationship - A relationship is a connection between two or more things.

  • Unit fraction - A unit fraction is a fraction that has a numerator of one.

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).

Loading...

6 Questions

Q1.
Tick the unit fractions.
Correct answer: $$ \frac{1}{5} $$
$$ \frac{3}{6} $$
Correct answer: $$ \frac{1}{12} $$
$$ \frac{6}{7} $$
$$ \frac{8}{4} $$
Q2.
Look at the image and complete. Each part is one-__________ of the whole.
An image in a quiz
half
Correct answer: quarter
fifth
sixth
Q3.
Look at the image. One-__________ of the whole is circled.
An image in a quiz
half
third
fifth
Correct answer: sixth
Q4.
Which equations match the image?
An image in a quiz
orange + orange = yellow
yellow + orange = yellow
Correct answer: yellow + yellow = orange
Correct answer: 2 × yellow = orange
Q5.
One-quarter of 28 is equal to
An image in a quiz
Correct Answer: 7
Q6.
One-fifth of 30 is equal to
Correct Answer: 6

6 Questions

Q1.
How many lots of yellow are equal to orange?
An image in a quiz
Correct Answer: 2, two
Q2.
Tick the representation that matches the equation: $$ \frac{1}{2} $$ × r = w
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
An image in a quiz
Q3.
Tick the equations that match the image.
An image in a quiz
g = r
Correct answer: g = 3 × r
$$ \frac{1}{3} $$ × r = g
Correct answer: $$ \frac{1}{3} $$ × g = r
Q4.
Tick the operation that can replace ‘of’ in a calculation.
+
Correct answer: ×
÷
Q5.
Tick the equations that match the image.
An image in a quiz
5 = 20 × 4
Correct answer: 20 = 4 × 5
Correct answer: $$ \frac{1}{4} $$ × 20 = 5
$$ \frac{1}{5} $$ × 20 = 4
Q6.
Tick the equations that match the image.
An image in a quiz
Correct answer: 18 = 6 × 3
18 = $$ \frac{1}{3} $$ × 6
$$ \frac{1}{6} $$ × 18 = 3
Correct answer: $$ \frac{1}{3} $$ × 18 = 6