Understand the relationship between addition and subtraction
Lesson details
Learning outcome
I can represent both addition and subtraction and understand the link between them.
Key learning points
- In problems, if the whole and one part of the whole are known, subtraction can be used to find the missing part.
- This can be represented using a subtraction equation.
- In problems, if the parts are known, they can be combined using addition to find the whole.
- This can be represented using an addition equation.
Keywords
Subtraction - To separate or take away one number from another, or to decrease an amount.
Addition - To find the total, or sum, by combining two or more numbers (addends).
Common misconception
The terms minuend, subtrahend and difference may be difficult if only used occasionally.
Ensure the terms are used by the teacher throughout lessons and encourage children to use them when explaining their thinking.
Teacher tip
Discuss the partitioning structure of subtraction in terms of one part having a characteristic and one part not having that characteristic to avoid children becoming confused if the whole group does not have two clearly identifiable parts.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which bar model has a whole of 5?
Q2.Which bar model represents this story? I have 6 pennies in my two pockets. 3 pennies are in one pocket. How many are in the other pocket?
Q3.Which equation could represent the bar model?
Q4.Find the missing number in the bar model.
Q5.Which subtraction equation could this bar model could represent?
Q6.Which equations could not be represented by this bar model?
Assessment exit quiz
6 Questions
Q1.Which counters could represent this equation? 3 + 5 = 8
Q2.Which addition equation could represent the counters?
Q3.Which counters could represent this equation? 8 – 3 = 5
Q4.Tick two equations that represent the beads on the bead string.
Q5.Jun writes this subtraction equation to match this picture. 6 - 2 = 4 What addition equation could he write?
Q6.Jun uses different coloured counters to represent the two parts in a story. He uses 4 red counters and 6 white counters. Which equations could represent this?
To help you plan your 1 maths lesson on: Understand the relationship between addition and subtraction, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 1 maths lesson on: Understand the relationship between addition and subtraction, 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 1 maths lessons from the Additive structures: addition unit, dive into the full primary maths curriculum, or learn more about lesson planning.