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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).

## Starter quiz

### 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?
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?
Correct answer: 10 = 7 + 3
7 - 3 = 10
Correct answer: 3 + 7 = 10

## Exit quiz

### 6 Questions

Q1.
Which of these numbers are odd?
4
Q2.
Which is the next odd number in the sequence?