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

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.

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. 

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