Think of a number and follow the machine’s instructions… I know what your number is! Can you explain how I know?
Age 7 to 14
Press the button in the interactivity and see what happens.
Now try again starting with a different number.
Try again.
Try starting with a fraction… or decimal… or negative number…
Why are your answers ALWAYS the same?
Test them on a partner to check that they lead to your anticipated solutions.