To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.

Make something larger / greater (in size or quantity).

Find the missing part of an addition story

Maths

In this unit pupils will find missing addends in equations. They will partition a whole into 2 parts representing first, then, now stories with subtraction equations. They will learn + and - are inverse operations. In the future unit pupils will explain that addition is commutative. They will find pairs of numbers to 10 and add or subtract 1 from any number.

In prior learning, pupils will have learnt to count confidently and have developed a deep understanding of the numbers to 10, the relationships between them and the patterns within those numbers. In this unit pupils will find missing addends. They will partition a whole into two parts and represent it with subtraction equations learning that addition and subtraction are inverse operations.

Additive structures: addition and subtraction

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. 

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

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?

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.

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

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

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

What equation does this picture represent?

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?

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?

This lesson will soon be taken down.

Find the missing part of an addition story

Lesson outcome