Understand addition as increasing a quantity

Maths

In this unit pupils will combine 2 or more parts to make a whole. They will learn addends are represented in any order and the = sign shows the whole and sum of the parts are equal. In the future unit pupils will find missing addends. They will partition a whole into 2 parts representing first, then, now stories with subtraction equations. They will learn + and - are inverse operations.

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 combine two parts to make a whole, learn that addends are represented in any order and learn that the equals sign shows that the whole and the sum of the parts are equal.

Additive structures: addition

Alex writes an equation to match this story.  2 + 1 = 3    What does the 3 represent? 

First, there were 2 children on the mat. Then, 3 joined. Now, there are 5.

First, there were 5 children on the mat. Then, 3 joined. Now, there are 2. 

First, there were 3 children on the mat. Then, 2 joined. Now, there are 5.

True or false. The counters shown represent this story. First, there were 4 cakes on the table. Then, my friend put 3 more cakes on the table. Now, there are 7 cakes on the table.

Which equation matches the story? First, there were 5 ducks in a pond. Then, 3 more ducks jumped in. Now, there are 8 ducks in the pond. 

Laura has written this equation to match the picture. Is she correct? 5 + 3 = 8

Tick an addition equation that could represent the counters. 

Tick two subtraction equations that could represent the counters. 

Izzy writes this subtraction equation to represent the bar model. 9 – 2 = ?   Which addition equation could also be represented by the bar model? 

Which set of counters could represent this story? There were 2 large teddies and 4 small teddies. How many teddies were there altogether? 

Tick the two equations which could be represented by this bar model. 

I have 5 pennies in my pockets. 2 are in one. How many are in the other?

Jun has 3 pennies, Izzy has 2. How many pennies do they have altogether?

I have 3 pennies in one pocket and 2 in the other. How many pennies altogether?

Which of these is not an addition story? 

This lesson will soon be taken down.

Understand addition as increasing a quantity

Lesson outcome