In math, finding the range is very easy. Look at the set of numbers and find the largest and the lowest. Subtract the lower number from the higher one and this will be the range of the set of numbers. For example, look at the follow set of numbers, 4, 6, 8, 32, 45, 6, 3, and 2. The largest number is 45, the lowest is 2. Therefore 45 – 2 = 43. The range of this set of numbers is 43. Easy!