The result of subtracting one number from another. Way in which two or more things we are comparing are not the same.

Way in which two or more things we are comparing are like each other.

To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.

Calculate the difference

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

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 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

Which equation has been written to find the difference between 7 and 3?

Which equations represent the difference between the towers of cubes?

Aisha used 7 coloured pencils for her artwork. Lucas used 4    How many more coloured pencils did Aisha use than Lucas? 
Aisha used {{ }} more coloured pencils than Lucas.

There are 4 children outside and 8 children inside. How many fewer children are outside than inside? There are {{ }} fewer children outside than inside.

Which pairs of numbers have a difference of 4?

Use number facts to 10 to match the parts of the equation.

There are 3 _________ spiders than ladybirds

Difference between the number of pencils and the number of pens

Look at the image. Which numbers in the bar model represent the pens, pencils and difference?

What is the difference between the number of cubes shown?

What is the difference between the number of cubes shown? {{ }}

Calculate the difference

Lesson outcome