This is Magic Maths. Lots of practice subtracting a 2-digit number from another 2-digit number within 99, with or without regrouping. Interact with the duck, beginning with your two inputs. CLICK when the duck instructs you to do so. Make sense of what is happening.
You do not need to know anything about Scratch to use this resource. If you are interested in the code, when online click See inside. There are 4-pages of PDF printable resources on the web site https://readysteadycode.ie. Also you can access an Addition equivalent to the resource from the website or replace the nine-digit number above with 193739221. For more Mathemagic and resources see the Ready Steady Code 'Numeracy' Studio at https://scratch.mit.edu/studios/5999446 Seamus O'Neill
