Find the missing part of an addition story | Maths | Quizalize & Oak National Academy

Starter quiz

Match the numbers on the bar model to what they represent.

3

⇔

part ✓

8

⇔

whole ✓

5

⇔

part ✓
Look at this equation. 10 = 4 + 6 Which numbers are addends?

6 ✓

10

4 ✓
Match the number or symbol to the correct description of what it represents.

4

⇔

number of cold drinks ✓

+

⇔

the addends combine to make the whole ✓

2

⇔

number of hot drinks ✓
What equation does this picture represent?

4 + 3 = 7 ✓

4 - 3 = 1

3 + 4 = 7 ✓
At the start of the story, there are 6 books on the shelf. At the end of the story, there are 8 books on the shelf. How many books were added?

'2' ✓
At the start of the story, there were 9 cakes on a plate. At the end of the story, there were 6 cakes on the plate. How many cakes were eaten?

'3' ✓

Exit quiz

Which representation would match this addition story? First, there were 2 pencils in the pot. Then, 7 pencils were put back in. Now, there are 9 pencils in the pot.
What is missing from this equation?

6 ✓

9

12
Which tens frame shows the missing 'first' part of this story?

a

b ✓

c
At the start of the story, there were 6 coins. At the end of the story, there were 8 coins. How many coins were added to the piggy bank?

'2' ✓
Which equation represents this story? At the start of the story, there were 3 cookies on the plate. At the end of the story, there were 7 cookies on the plate.

3 + 7 = 10

3 + 4 = 7 ✓

4 + 3 = 7
Who has solved this problem correctly?

Alex

Aisha

Neither ✓

Worksheet

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Lesson Details

Key learning points

When we know two parts of a ‘First, then, now’ story, we can find the missing part.

Common misconception

Children may add the parts instead of subtracting a part to find the missing amount.

Give plenty of opportunities to act out stories and solve problems with practical objects. Encourage children to think about the size of the missing part in relation to the known parts, i.e. whether it will be larger or smaller than the other parts.

Keywords

First - Before anything else
Then - After something in time.
Add - To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.
Increased - Make something larger / greater (in size or quantity).