Understand the relationship between addition and subtraction 

Maths

In this unit pupils will accurately and efficiently solve multi-step addition and subtraction problems. They will understand and explain how both addition and subtraction equations can be used to describe the same additive relationship In the future unit pupils will identify the addends and the sum in column addition They will use their knowledge of place value to correctly lay out column addition

In the prior unit pupils reviewed and secured previous knowledge of adding 3 addends, understanding they could be added in any order, bridging through 10. In this unit pupils will accurately and efficiently solve multi-step addition and subtraction problems. They will understand and explain how both addition and subtraction equations can be used to describe the same additive relationship.

Understand additive relationships and apply them to rearrange equations

What number is the subtrahend in this equation? 36 − 16 = 20

Match the names to the numbers in this equation: 125 − 50 = 75

What number is missing from the bar model? 

Match the addition and subtraction equations by looking for the same whole and the same parts. 

Which equations are represented by the bar model?

Which equations could be represented by this bar model? 

Which numbers in the equation are addends? 28 + 26 = 54

What number is the sum in this equation? 76 = 60 + 16

What sum is missing from this bar model? 

Which other addition equations match this calculation? 150 + 70 = 220

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