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

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

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

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

What vocabulary can be used to compare Alex and Sofia?

Look at the image. Which statements are true?

Which statement correctly compares the flower and the grass?

There are {{ }} more ladybirds than spiders.

What is the difference between the numbers shown? {{ }}

Izzy’s bean is taller than Andeep’s bean. What is the difference between the heights? {{ }} cm

Look at this expression. 8 + 5     Which expression correctly shows that the second addend has been partitioned to bridge 10?

How should 7 be partitioned in each expression to bridge through 10?

8 + 6 = 14     6 is partitioned to bridge through 10     What is the missing addend?  8 + {{ }} + 4 = 14

Each equation is equal to 10     Match each equation to its missing part.

Laura used a number line for this equation. 13 − 5 = 8
How has Laura shown bridging through 10?

How should 6 be partitioned to bridge through 10?

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

Lesson outcome