Lesson

Can you use fraction bars to write fractions ?

Below is a fraction bar.

What is the fraction of the coloured piece?

A

\dfrac{2}{3}

B

\dfrac{3}{4}

C

\dfrac{1}{4}

D

\dfrac{1}{3}

Worked Solution

Idea summary

To find the numerator of the fraction, count the number of parts shaded.

To find the denominator, work out the total number of parts.

This video introduces the idea of adding and subtracting fractions.

What is \dfrac{1}{12} + \dfrac{1}{12}.

Worked Solution

Idea summary

We can add or subtract fractions by using area models.

What if the fractions have a value greater than 1? Yes, we can still add or subtract them.

Find the value of \dfrac{4}{7} - \dfrac{3}{7}.

Worked Solution

Idea summary

Adding or subtracting fractions **with the same denominator** is very similar to adding or subtracting with whole numbers. The difference is we are counting fraction parts instead.

Investigate strategies to solve problems involving addition and subtraction of fractions with the same denominator