3D shapes introduction ABC

Two circles: On one circle favourite colour red the other circle favourite colour blue. If anyone like both it goes{...}

The number above is always the difference between the two beneath it. Can you find different pairs of numbers with{...}

Click on the link to view slideshow. https://docs.google.com/presentation/d/1bPl53dswiEWhP-oxUT5csI8VcMDTkzcoO4ZOCcCg7cw/edit?usp=sharing        {...}