Choose the desired operations and difficulty level then type in the correct result to the problems displayed on the top of the screen.
Create integers by adding fractions. Every 5 seconds you lose a point, so stay sharp.
Now this one can be confusing. We strongly recommend you carefully read the Add the Line tutorial to learn how to play the game.
How fast can you combine numbers that add to 10? Create color combos to earn extra points. Go!
Count and pop the balloons as they fly by. Manage to pop enough balloons to advance to the next level.
Some argue if 0 is a natural number or not. Natural numbers are those used for counting. Either way you need to avoid all of them and try to get the best possible score.