Recall one and two more or less than numbers to ten
Lesson details
Learning outcome
I can recall known addition and subtraction facts within 10
Key learning points
- When we add one, we can see this as the number after in our count. We can think of this as one more.
- When we subtract one, we can see this as the number before in our count. We can think of this as one less.
- Adding two from an even/odd number, we can see this as the even/odd number after. We can think of this as two less.
- Subtracting two from an even/odd number, can be seen as the even/odd number before. We can think of this as two less.
Keywords
One more - The number after a given number is one more than it.
One less - The number before a given number is one less than it.
Two more
Two less
Common misconception
Children may resort to counting strategies to find the difference e.g. counting back to subtract. Children may incorrectly identify the even/odd number 'before' or 'after' the one given.
Provide practice for children to identify numbers before/after or odd/even numbers before/after a given one. Initially, allow children to use a number line. Remove this scaffold once feeling more confident.
Teacher tip
Note, the games within this lesson will have some constraints when adding and subtracting 2, so amendments have been suggested. Throughout the tasks, no equations are written as the focus is on aiding recall, however, this could be added if children need reinforcement of equations as representation.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of these represent the same addends being added?
Q2.Which of these represent the same expression?
Q3.Which number shown on the dice is missing from the bar model?
Q4.Which pair of dice could be the parts in this bar model?
Q5.What is the missing number?
Q6.Alex is trying to write all the addition and subtraction facts for this bar model. He can’t think of the last one.
What is the missing equation from his list?
Assessment exit quiz
6 Questions
Q1.Complete the sentence. One more than 5 is ___
Q2.Complete the sentence. One less than 9 is ___
Q3.Which of these equations is the same as finding one more?
Q4.Complete the sentence. Two less than 6 is ___
Q5.Tick all the correct statements.
Q6.Match the equation to the correct total.
6
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7
To help you plan your 2 maths lesson on: Recall one and two more or less than numbers to ten, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 2 maths lesson on: Recall one and two more or less than numbers to ten, 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 Secure fluency of addition and subtraction facts within 10 unit, dive into the full primary maths curriculum, or learn more about lesson planning.