Working with the number one might give those wids a better clue as to what's going on Today I used the number three and 27or 28 students got it right way. There were about 10 students who just took a long time to solve it. If you look that ratio I think using the number three to present the problem turned out oK Mr. Tsubota, vice principal lead this comment. Mr. Tsubota: You had those cards right? The problem with subtracting a two- digit number from a three digit number where you end up with a difference of 5 is well, I was wondering why you are giving away the answers. If you let the kids solve the problems, it would have been much more interesting. You pick some students at random, have them come up to the board and write down the answers. I think that would've made it more interesting. So there's no order to