Use the additive relationship to rearrange subtraction equations
Lesson details
Learning outcome
I can rearrange subtraction equations.
Key learning points
- Equations can be represented using part-part-whole or bar models.
- The subtrahend and difference are parts and the minuend is the whole.
- Subtraction equations can start with the minuend or the difference.
Keywords
Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another.
Difference - The difference is the result after subtracting one number from another.
Common misconception
Pupils may find it more challenging to use equations starting with the difference, or may make mistakes writing these.
Emphasise the need for balance in equations. Both sides of the equation must be equal. Equations can start with the minuend or the difference.
Teacher tip
Subtraction equations can be represented using tens frames. Counters of different colours can show the subtrahend and difference. Pupils should learn that the subtrahend and difference in an equation can be changed over as they are both parts.
Licence
except where otherwise stated. See Oak's terms & conditions (Collection 2).Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is 33 − 10 =
Q2.What is 400 − 100 =
Q3.Which number in the bar model represents the whole?
Q4.What is 130 − 40?
Q5.Which numbers could complete the bar model?
Q6.Which equations are equal to 50?
Assessment exit quiz
6 Questions
Q1.Which number is the minuend in this equation: 55 − 20 = 35
Q2.What is the difference between 11 and 9?
Q3.Which equations are represented by the bar model?
Q4.Look at the bar model. What part is missing?
Q5.Izzy writes subtraction equations represented by the bar model. Which equation is NOT correct?
Q6.Match up the addition and subtraction equations.
28 − 8 = 20
28 − 4 = 24
24 − 4 = 20
28 − 14 = 14
To help you plan your 3 maths lesson on: Use the additive relationship to rearrange subtraction equations, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Use the additive relationship to rearrange subtraction equations, 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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