www.numberpower.org 
Mean,
Median, Mode, Range 
Mean
 To find the mean
add all the numbers together then divide the answer by the amount of numbers.
Another name for mean is average. 
Median  To find the medium list all the numbers in correct order, being sure to include an doubles. Then find the middle number. If there is an odd amount of numbers  the medium is the middle number. If there is an even amount the medium is found by adding the middle two numbers together and dividing by 2. The resulting number is the medium. 
Mode  after listing all numbers in order, the mode is that number which appears the most times. There can be more than one mode provided they are listed the same amount of times.  Range  is the distance between the lowest and highest number. It is found by subtracting the lowest from the highest. 
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