Any of the numbers that are added together.

Not wasting time or effort. An efficient strategy is one we can carry out easily.

A plan or method to achieve a specific goal.

Add three addends efficiently

Maths

Add three addends

Use a 'First, then, then, now' story to add three addends

Explain that the addends can be added in any order

Add three addends efficiently by finding two addends that total 10

Add two numbers that bridge through 10

Add and subtract two numbers that bridge through 10

Compare the number of objects in two sets or difference between two measures.

Calculate the difference

Calculate the difference in different contexts

Explain what the difference is between consecutive numbers

Calculate the difference when information is presented in a pictogram

Calculate the difference when information is presented in a bar chart

Use knowledge of calculating within 20 to solve problems

Use knowledge of calculating within 20 to solve problems involving statistics

In this unit pupils will add 3 addends. They will use a strategy such as finding 2 addends to total 10 or 2 numbers to bridge though 10.  In the future unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number .They will use a part-part-whole model to represent addition and subtraction.

In the prior unit pupils revisited addition and subtraction within ten. They consolidated addition and subtraction strategies. In this unit pupils will add 3 addends. They will use a strategy such as finding 2 addends to total 10 or 2 numbers to bridge though 10.

In this unit pupils will add 3 addends. They will use a strategy such as finding 2 addends to total 10 or 2 numbers to bridge though 10.

Calculating within 20

True or false.
The order of the addends can be changed to make the addition easier.

The image shows Aisha's strategy for adding three addends. What strategy did she use?

Lucas used this strategy to add the three addends.
Order the steps taken in his strategy

Finding the total of the first two addends.

Finding the total of the last two addends.

Which step has been taken in solving this equation?

Match the expression to the equation that could be used to calculate the sum.

Solve the equations using an efficient strategy.

Look at each expression and match to the correct description.

What will the third addend be to make the expression sum to 10?

Match the double fact to the correct answer.

Which equations represent the part-part-whole model?

Laura has been adding three addends by combining different pairs. Match each starting expression to her new equation. 

Add three addends efficiently

Lesson outcome