Understand the relationship between addition and subtraction

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

Which counters could represent this equation?   3 + 5 = 8 

Which addition equation could represent the counters? 

Which counters could represent this equation?   8 – 3 = 5 

Tick two equations that represent the beads on the bead string.

Jun writes this subtraction equation to match this picture. 6 - 2 = 4   What addition equation could he write?

Jun uses different coloured counters to represent the two parts in a story. He uses 4 red counters and 6 white counters. Which equations could represent this? 

Which bar model represents this story? I have 6 pennies in my two pockets. 3 pennies are in one pocket. How many are in the other pocket? 

Which equation could represent the bar model?

Find the missing number in the bar model. 

Which subtraction equation could this bar model could represent?

Which equations could not be represented by this bar model?

This lesson will soon be taken down.

Understand the relationship between addition and subtraction

Lesson outcome