![Equivalent Pairs](/sites/default/files/styles/medium/public/thumbnails/content-id-14816-icon.jpg?itok=QnD2a1tJ)
Addition and subtraction
![Equivalent Pairs](/sites/default/files/styles/medium/public/thumbnails/content-id-14816-icon.jpg?itok=QnD2a1tJ)
![Getting the balance right](/sites/default/files/styles/medium/public/thumbnails/content-id-14814-icon.jpg?itok=b2L797R3)
article
Getting the balance right
In this article for primary teachers, Ems shares some common misconceptions surrounding the equals sign, and suggests ways to help learners develop their understanding.
![Interactive Balance](/sites/default/files/styles/medium/public/thumbnails/content-id-14798-icon.png?itok=SlMhGwU-)
interactivity
Interactive Balance
In this simulation of a balance, you can drag numbers and parts of number sentences on to the trays. Have a play!
![True or False?](/sites/default/files/styles/medium/public/thumbnails/content-id-14797-icon.jpg?itok=uZ_dbHNt)
problem
True or False?
Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?
![Sweetie Box](/sites/default/files/styles/medium/public/thumbnails/content-id-14793-icon.jpg?itok=flw9ydzy)
problem
Sweetie Box
Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
![Arranging Additions and Sorting Subtractions](/sites/default/files/styles/medium/public/thumbnails/content-id-14726-icon.png?itok=JpyCE6wp)
problem
Arranging Additions and Sorting Subtractions
Order these four calculations from easiest to hardest. How did you decide?
![Subtraction Slip](/sites/default/files/styles/medium/public/thumbnails/content-id-14740-icon.jpg?itok=M2VCKxJ5)
problem
Subtraction Slip
Can you spot the mistake in this video? How would you work out the answer to this calculation?
![Fruity Pairs](/sites/default/files/styles/medium/public/thumbnails/content-id-14727-icon.jpg?itok=4ujb6NzW)
problem
Fruity Pairs
Which two items of fruit could Kate and Sam choose? Can you order the prices from lowest to highest?
![Let's Get Flexible!](/sites/default/files/styles/medium/public/thumbnails/content-id-14722-icon.jpg?itok=NlNtedqQ)
article
Let's Get Flexible!
In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.
![Football Sum](/sites/default/files/styles/medium/public/thumbnails/content-98-06-six1-icon.gif?itok=aK-wnGjv)