The difficulties of this game was that I had forgotten it was from top to bottom and I did it from bottom to top so I got some wrong. The rest of the game was easy except for the fractions and decimals. Those were hard because first I was subtracting and adding whole numbers then I move on to the fractions part and it gets hard. I always struggled a little with fractions and decimals. I think that the fractions can be the most challenging. But if you don't have trouble with it then that will be very easy for you. Now that I have had other teachers review them it gets easier every time I do them!