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

  1. Adding two to an odd number gives the odd number after.
  2. Subtracting two from an odd number gives the odd number before.
  3. When we count forwards in odd numbers, we add two more each time.
  4. When we count backwards in odd numbers, we subtract two each time. The result is 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.

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

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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6 Questions

Q1.
Match the equations that show that addition is commutative.
Correct Answer:4 + 6 = 10,6 + 4 = 10

6 + 4 = 10

Correct Answer:8 + 2 = 10,2 + 8 = 10

2 + 8 = 10

Correct Answer:10 = 1 + 9,10 = 9 + 1

10 = 9 + 1

Correct Answer:10 = 7 + 3,10 = 3 + 7

10 = 3 + 7

Q2.
Match the numbers that are one more and one less.
Correct Answer:One more than 7 is,8

8

Correct Answer:One less than 10 is,9

9

Correct Answer:One more than 5 is,6

6

Correct Answer:One less than 8 is,7

7

Q3.
Which of these numbers are consecutive?
Correct answer: 9 and 8
3 and 5
Correct answer: 6 and 7
Q4.
What is the odd number that comes after 3?
An image in a quiz
1
Correct answer: 5
7
Q5.
What is the odd number that comes before 7?
An image in a quiz
Correct Answer: 5, five
Q6.
Which equations does this bar model show?
An image in a quiz
Correct answer: 10 = 7 + 3
7 - 3 = 10
Correct answer: 3 + 7 = 10

6 Questions

Q1.
Which of these numbers are odd?
An image in a quiz
4
Correct answer: 3
Correct answer: 7
Q2.
Which is the next odd number in the sequence?
An image in a quiz
Correct Answer: 9, nine
Q3.
The missing odd number on this number line is .
An image in a quiz
Correct Answer: 5, five
Q4.
Which representation shows that 2 has been subtracted from this number?
An image in a quiz
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q5.
What is the missing number in this part-part-whole model?
An image in a quiz
Correct Answer: 3, three
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.
Correct Answer: 1, one