An investigation looking at doing and undoing mathematical operations focusing on doubling, halving, adding and subtracting.
This big box adds something to any number that goes into it. If you know the numbers that come out, what addition might be going on in the box?
Two children made up a game as they walked along the garden paths. Can you find out their scores? Can you find some paths of your own?
This project challenges you to work out the number of cubes hidden under a cloth. What questions would you like to ask?
Annie and Ben are playing a game with a calculator. What was Annie's secret number?