Basic to the understanding of unit conversion is the understanding of equivalence, the understanding of the multiplicative identity of 1, and how the two are related. For a review of these concepts, click on Review.
If you have forgotten how to manipulate fractions, visit Fractions for Adults on SOSMath for an in-depth review.
Review the following table (Webster's New World Dictionary, Second Edition, Simon and Schuster, 1982) of Standard Units of Conversion to see if you can create fractions that have a value of 1. You can click to examples following each table.
Example 4: Convert 500 hectares to square feet.
Solution: Look for a series of links from hectares to square feet.
Therefore, the fraction is equivalent to 1.
As you work more and more of this conversion problems, you can leave out a lot of steps and simply "cross out" similar units. In the original set-up
, you would simply cross out common units and go straight to the expression = 5,381,838,000 square feet
Just be sure that you remember why you are allowed to do the cancelling.
If you would like to work some problems click on Problems.
If you would like to go back to the table of contents, click on Table of Contents.
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Do you need more help? Please post your question on our S.O.S. Mathematics CyberBoard.
Author: Nancy Marcus
Sun Aug 10 21:07:12 MDT 1997