Mental Arithmetic

Train mental calculations simple mathematical operations in a playful way

With this program you can train your abilities mental calculations. You can select one or more mathematical operations, for test cases. ed by addition, subtraction, multiplication and division. Also select a range of numbers that will be present in the examples. Your task is to choose the correct answer from each bid. Each correct answer will add a few seconds to the time set aside for reflection responses. Survive as long as possible in this storm mathematical !!!!.