- Year 3
Subtract fractions with the same denominator
I can subtract fractions with the same denominator.
- Year 3
Subtract fractions with the same denominator
I can subtract fractions with the same denominator.
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Lesson details
Key learning points
- If 5 subtract 2 is equal to 3 then 5 one sevenths subtract 2 one sevenths is equal to 3 one sevenths.
- To subtract fractions with the same denominator you subtract the numerators using the language of unitising.
- If fractions have the same denominator they can be subtracted.
Keywords
Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another. There can be more than one.
Numerator - A numerator is the top number in a fraction. It shows how many parts we have.
Denominator - A denominator is the bottom number in a fraction. It shows how many parts a whole has been divided into.
Common misconception
Children will rush to subtract both the numerator and the denominator when performing a subtraction of fractions with either structure in the lesson.
Reinforce the concept of the unit being the fraction which is denoted by the denominator. Get children to perform subtractions using real life objects before moving them onto using fractions instead, perhaps using unit fractions to begin with.
To help you plan your year 3 maths lesson on: Subtract fractions with the same denominator, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 3 maths lesson on: Subtract fractions with the same denominator, 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.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Composition of non-unit fractions: addition and subtraction unit, dive into the full primary maths curriculum, or learn more about lesson planning.
Licence
Prior knowledge starter quiz
6 Questions
Q1.Which of these definitions describes the minuend?
Q2.Which number is the subtrahend in the following equation?
12 − 5 = 7
Q3.What subtraction is being shown by this number line?

Q4.Each marble in a bag is $$ \frac{1}{12} $$ of the whole bag. How many marbles are there in the bag?
Q5.The bar model shows three equal parts of the whole. What fraction can be used to label this?

Q6.Select the correct sum. $$ \frac{3}{9} $$ + $$ \frac{4}{9} $$ = ___
Assessment exit quiz
6 Questions
Q1.What fraction subtraction equation is being represented by the bar model?

Q2.Aisha and Alex share a pizza cut into 8 slices. Alex eats sixth-eighths of the pizza.
How much does Aisha eat? Aisha eats ___ of the pizza.

Q3.A full box of eggs contains 12 eggs. First there were 10 eggs in the box, then 4 were used to make pancakes. Which equation matches this problem?

Q4.A full box of eggs contains 12 eggs. First there were 8 eggs in the box, then 7 were used to make pancakes and cakes. Which fraction represents the number of eggs left?
