Compare unit fractions by looking at the denominator | Maths

Starter quiz

Which inequality symbol goes into the gap? 3 ______ 4

'<' ✓
Which inequality symbol goes into the box to show which glass is fuller?

'>' ✓
Which inequality symbol goes into the gap? 11 + 3 ______ 10 + 5

>

< ✓
Which of the following is the definition of a denominator?

The number of equal parts that a whole has been divided into. ✓

The number of selected equal parts.

A line to show that a whole has been divided into equal parts.
$What is fraction of the whole is the shaded part below?$

What is fraction of the whole is the shaded part below?

$\frac{1}{2}$

$\frac{1}{3}$

$\frac{1}{4}$ ✓

$\frac{1}{5}$
Match the fraction name to the fraction notation.

$\frac{1}{4}$

⇔

one-quarter ✓

$\frac{1}{5}$

⇔

one-fifth ✓

$\frac{1}{10}$

⇔

one-tenth ✓

$\frac{1}{11}$

⇔

one-eleventh ✓

What number does a unit fraction always have as a numerator?

1 ✓

2

3

4
Which inequality symbol goes into the box to show which glass is fuller?

'>' ✓
Fill in the correct word from the choices below to complete this sentence: one-third is _________ than one-fifth.

greater ✓

smaller
$Which inequality symbol completes this statement? <Math> \frac{1}{3} </Math> <span class="blank">______</span> <Math> \frac{1}{2} </Math>$

Which inequality symbol completes this statement? $\frac{1}{3}$ ______ $\frac{1}{2}$

'<' ✓
Which inequality symbol completes this statement? $\frac{1}{4}$ ______ $\frac{1}{3}$

'<' ✓
Which inequality symbol completes this statement? $\frac{1}{9}$ ______ $\frac{1}{11}$

'>' ✓

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When the whole is the same, the greater the number of equal parts, the smaller each equal part is.
When the whole is the same, the smaller the number of equal parts, the larger each equal part is.
When comparing unit fractions, the greater the denominator, the smaller the fraction.
When comparing unit fractions, the smaller the denominator, the larger the fraction.

Children often believe that the greater the denominator the bigger the fraction.

Reinforce this using the fraction wall. Constantly refer back to it and ensure that the children become experts at using it as a tool for comparison.

Whole - The whole is all of a group or number.
Part - A part is a section of the whole.
Denominator - A denominator is the bottom number in a fraction. It shows how many equal parts a whole has been divided into.
Unit fraction - A unit fraction is a fraction where the numerator is 1