Add and subtract two from even numbers within 10 | Maths

Starter quiz

Look at the part-part-whole model. If 10 is the whole and 3 is a part, what is the missing part? ______.

'7' ✓
Which subtraction equations could the part-part-whole model show?

10 - 4 = 6 ✓

4 - 6 = 10

6 - 4 = 10

10 - 6 = 4 ✓
Match the numbers that show one less.

One less than 7 is

⇔

6 ✓

One less than 9 is

⇔

8 ✓

One less than 5 is

⇔

4 ✓
Which numbers are consecutive?

4 and 5 ✓

6 and 8

10 and 9 ✓
Sam has one pound in her pocket. Jacob has five pounds. How much money do they have altogether? ______ pounds.

'6' ✓
Jacob wants to read 8 pages of his book. He has read 1 page already. How many more pages does he need to read?

'7' ✓

Exit quiz

Which of these numbers are even numbers?

2 ✓

8 ✓

7
What is the next even number after 4?

'6' ✓
When counting backwards, what is the even number before 10?

'8' ✓
Which representation shows that 2 has been added to find the next even number?
First, Sam had 6 pencils. Then, Jacob took 2 of them. Now, Sam has ______ pencils.

'4' ✓
4 + ______ = 6

'2' ✓

Worksheet

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Presentation

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Video

Lesson Details

Key learning points

Adding two to an even number gives the even number after.
Subtracting two from an even number gives the even number before.
When we count forwards in even numbers, we add two more each time.
When we count backwards in even numbers, we subtract two each time.

Common misconception

Children may incorrectly identify the even number 'before' or 'after' the one given.

Provide practice in the form of missing number problems where children must identify the even 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 -