New
New
Year 2

# Recall one and two more or less than numbers to ten

I can recall known addition and subtraction facts within 10

New
New
Year 2

# Recall one and two more or less than numbers to ten

I can recall known addition and subtraction facts within 10

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## Slide deck

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## Lesson details

### Key learning points

1. When we add one, we can see this as the number after in our count. We can think of this as one more.
2. When we subtract one, we can see this as the number before in our count. We can think of this as one less.
3. 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.
4. Subtracting two from an even/odd number, can be seen as the even/odd number before. We can think of this as 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.

### 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

### 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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## Worksheet

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## Starter quiz

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### 6 Questions

Q1.
Which of these represent the same addends being added?
Correct Answer: An image in a quiz
Q2.
Which of these represent the same expression?
Correct Answer: An image in a quiz
Q3.
Which number shown on the dice is missing from the bar model?
Correct Answer: An image in a quiz
Q4.
Which pair of dice could be the parts in this bar model?
Correct Answer: An image in a quiz
Q5.
What is the missing number?
8
7
Correct answer: 6
5
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?
10 − 6 = 4
Correct answer: 10 − 4 = 6
6 − 4 = 10
6 + 4 = 10

## Exit quiz

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### 6 Questions

Q1.
Complete the sentence. One more than 5 is ___
5
Correct answer: 6
7
8
Q2.
Complete the sentence. One less than 9 is ___
5
6
7
Correct answer: 8
Q3.
Which of these equations is the same as finding one more?
3 + 3 = ___
Correct answer: 3 + 1 = ___
Correct answer: 1 + 3 = ___
3 - 1 = ___
Q4.
Complete the sentence. Two less than 6 is ___
6
5
Correct answer: 4
3
Q5.
Tick all the correct statements.
Correct answer: Two more than 7 is 9
4 is two more than 6
Correct answer: 3 is two less than 5
6 is two more than 8
Q6.
Match the equation to the correct total.
Correct Answer:4 + 2 = ___ ,6

6

Correct Answer:2 + 1 = ___ ,3

3

Correct Answer:5 + 2 = ___,7

7

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