Look at four values and decide which is the biggest.Sharpen basic math facts skills, reinforce math facts, measurement, order of operations, fractions, decimals. metric, and more. Fun and challenging for elementary aged students and adults alike.This exercise will keep your brain sharp and improve your ability to calculate on the fly.Think you can get 100%? Good luck. You have 30 seconds to answer each question.The program also keeps track of the total time.