A group of animals has made a seesaw in the woods. How can you make the seesaw balance?
Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
Can you hang weights in the right place to make the the number balance balanced?
Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?