Identify knowns and unknowns in addition equations

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

Which number represents the difference in this equation? 25 − 15 = 10

The result after subtracting one number from another. 

The total when numbers are added together.

What is the missing part in this bar model? 

What is the value of the missing part in this bar model? 

Which pairs of numbers have a difference of 3? 

How could you calculate the missing part in this bar model? 

Which number in this equation is the sum? 100 = 20 + 80

Which of these are parts in an equation? 

What is the missing sum in this bar model? 

What could the missing addends in this bar model be? 

Which equations could be represented by the bar model?  

This lesson will soon be taken down.

Identify knowns and unknowns in addition equations

Lesson outcome