Talk:SNECMA Atar
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[edit] Two division units problem
In mathematical operations, multiplication and division have the same priority. Absent any grouping with parentheses and the like, the operations proceed from left to right.
That means that for "lb/hr*lbf" you would first divide pounds by hours, then multiply the result by pounds-force. However, that is not what is intended. What it should be is "(lb/h)/lbf" with the second operation a division by the pounds force. This is equivalent to "lb/(h·lbf)"; note, however the difference between this and what used to appear on this and similar pages. The parentheses are necessary for the units expressed in this format.
In this article I have used the superscripts format, an unambiguous way of expressing these complex operations because it still works no matter how you rearrange the component units. Gene Nygaard 13:28, 28 November 2005 (UTC)
