Learn to add, substract , multiply, and divide numbers by quiz. First, choose play , and then the game you wants (either add,substraction,multiplication,or divide) . You can choose 1 from 4 available answers. if your answer is correct, the C number will increase, else W number will increase (C for correct and W for wrong), don't forget about the time. It is limited to 90 seconds. Solved as many questions as you can in the time.