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

A plan or method to achieve a specific goal.

Explain that the addends can be added in any order

Maths

Add three addends

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

Add three addends efficiently

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

We can add numbers in any order. We say that addition is __________

If you begin by adding the first two addends together, what would your calculation now be?

Match the steps the three different children took to find the number of pieces of fruit altogether.

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

Which equations represent the part-part-whole model?

Look at each expression and match it to the correct description.

Match the addition expressions that are equal to each other. 

Which of the equations could not represent this ten frame?

Look at this ten frame. Altogether there are 9 counters. The addends are 2, 4 and {{ }}

Match each number to the correct part of the model.

Which equation is shown on this number line?

Explain that the addends can be added in any order

Lesson outcome