Good but needs some improvements – Subtracting Sardines HD Review

First of all, as some were saying, there is no option to block negative numbers. Second, unlike the multiplication, the user is not able to see the math problem above the answer. For example, in multiplication, there is 2x3 above the answer of 6, but in substraction answer of 3, there is no explanation of 5-2, something like that. I think being able to see the math problem is important rather than just the answer. So please fix them and i'll give you 5 stars. Thank you.
Review by Plsfixsoon on Subtracting Sardines HD.