**Mean **is the sum of all numbers in a group divided by the number of figures. It is commonly called the average.

- The arithmetic
**mean**of 1, 5, and 6 is (1 + 5 + 6) ÷ 3 = 4.

**Median **is the midpoint of a range of numbers. To find a median, write the numbers in order from largest to smallest. The figure with the same number of figures above and below is the median.

- The
**median**of 12, 19, 23, 45, and 60 is 23.