New
New
Year 1
Add and subtract two from odd numbers within 10
I can add or subtract two from odd numbers within 10
New
New
Year 1
Add and subtract two from odd numbers within 10
I can add or subtract two from odd numbers within 10
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Lesson details
Key learning points
- Adding two to an odd number gives the odd number after.
- Subtracting two from an odd number gives the odd number before.
- When we count forwards in odd numbers, we add two more each time.
- When we count backwards in odd numbers, we subtract two each time. The result is two less.
Keywords
Odd - Any integer (not a fraction) that cannot be divided exactly by 2
Even - Any integer that can be divided exactly by 2 is an even number. The last digit is 0, 2, 4, 6 or 8
Two more
Two less
Common misconception
Children may incorrectly identify the odd number 'before' or 'after' the one given.
Provide practice in the form of missing number problems where children must identify the odd numbers before or after one given. Do this until fluent. Initially, allow children to use a number line. Remove this scaffold once feeling more confident.
The sequence of steps in this lesson are the same as those in that for adding and subtracting one, except now we are using children's knowledge of odd numbers 'before' and 'after'. Find time to practise counting forwards and backwards in odd numbers until children are fluent in this pattern.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on
Open Government Licence version 3.0
except where otherwise stated. See Oak's terms & conditions (Collection 2).Lesson video
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Starter quiz
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6 Questions
Q1.
Match the equations that show that addition is commutative.
6 + 4 = 10
2 + 8 = 10
10 = 9 + 1
10 = 3 + 7
Q2.
Match the numbers that are one more and one less.
8
9
6
7
Q3.
Which of these numbers are consecutive?
3 and 5
Q4.
What is the odd number that comes after 3?
1
7
Q5.
What is the odd number that comes before 7?
Q6.
Which equations does this bar model show?
7 - 3 = 10
Exit quiz
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6 Questions
Q1.
Which of these numbers are odd?
4
Q2.
Which is the next odd number in the sequence?
Q3.
The missing odd number on this number line is .
Q4.
Which representation shows that 2 has been subtracted from this number?
Q5.
What is the missing number in this part-part-whole model?
Q6.
Sam has 3 metres of ribbon. She cuts 2 metres off to use to make bracelets. How many metres of ribbon are left? metre.