How do you find range to estimate a sum?

Answer 1

Example:

Problem:

Cheryl took 7 math tests in one marking period. What is the range of her test scores?

89, 73, 84, 91, 87, 77, 94

Solution:

Ordering the test scores from least to greatest, we get:

73, 77, 84, 87, 89, 91, 94

highest - lowest = 94 - 73 = 21

-The range of these test scores is 21 points.

so:

find the range for each list of scores

80,79,85,75,84,76,88,80

75,76,79,80,80,84,85,88

highest - lowest = range

88 - 75 = 13

hope this helps :)

http://www.mathgoodies.com/lessons/vol8/range.html