Add and subtract non-related fractions with different denominators
I can add and subtract non-related fractions with different denominators.
Add and subtract non-related fractions with different denominators
I can add and subtract non-related fractions with different denominators.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Common denominators for non-related fractions can be found using common multiples of the denominators.
- Fractions need to have the same denominator if we are to add and subtract them.
- In equivalent fractions, the numerators and denominators have been scaled up or down by the same factor.
Keywords
Common denominator - When two or more fractions share the same denominator, you can say they have a common denominator.
Related fractions - Related fractions are when the denominator of one fraction is a multiple of the denominator of the other fraction.
Non-related fractions - Non-related fractions are when the denominator of one fraction is not a multiple of the denominator of the other fraction.
Common multiple - A multiple that is common between two or more numbers is known as a common multiple.
Common misconception
When adding or subtracting fractions with different denominators, you just add or subtract the denominators from each other.
Encourage the children to use prior generalisations such as when the numerators are the same, the fraction with the largest denominator is the smallest, to help them reason about the above misconception.
To help you plan your year 6 maths lesson on: Add and subtract non-related fractions with different denominators, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 6 maths lesson on: Add and subtract non-related fractions with different denominators, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 2 maths lessons from the Addition and subtraction of fractions unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Starter quiz
6 Questions


Exit quiz
6 Questions


