V.2 I allowed multiple functions at a time --- just press = after each. ie, three-plus-two-EQUALS-times-eight-EQUALS-minus-one-EQUALS. IMPORTANT: the back button will clear the current answer if there is one, OR it can delete the last number entered!
If you want real action, check out my Calculator Operandi at http://scratch.mit.edu/projects/2403999/ ; a lot more features!
