Recall one and two more or less than numbers to ten | Maths

Starter quiz

Which of these represent the same addends being added?
Which of these represent the same expression?
Which number shown on the dice is missing from the bar model?
Which pair of dice could be the parts in this bar model?
What is the missing number?

8

7

6 ✓

5
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

10 − 4 = 6 ✓

6 − 4 = 10

6 + 4 = 10

Exit quiz

Complete the sentence. One more than 5 is ___

5

6 ✓

7

8
Complete the sentence. One less than 9 is ___

5

6

7

8 ✓
Which of these equations is the same as finding one more?

3 + 3 = ___

3 + 1 = ___ ✓

1 + 3 = ___ ✓

3 - 1 = ___
Complete the sentence. Two less than 6 is ___

6

5

4 ✓

3
Tick all the correct statements.

Two more than 7 is 9 ✓

4 is two more than 6

3 is two less than 5 ✓

6 is two more than 8
Match the equation to the correct total.

4 + 2 = ___

⇔

6 ✓

2 + 1 = ___

⇔

3 ✓

5 + 2 = ___

⇔

7 ✓

Worksheet

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Presentation

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Video

Lesson Details

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.

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 -