Speed Mathematics by Bill Handley

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Posted on 2010-08-15. By anonymous.

Description


Quote:
Speed math; literally. Simple stuff on how to do mathematical operations (addition, subtraction, division, multiplication) in a simplified manner. Fractions, squaring numbers, and extracting square/cube roots included.

Example: 96 x 97 = ?
96 x 97 =
Subtract each number from 100

96 x 97 =
4 3

Subtract diagonally. Either 96 - 3 or 97 - 4
The result is the first part of the answer
96 x 97 = 93
4 3

Multiply the numbers in the circles. 4 x 3 = 12
This is the second part of the answer

96 x 97 = 9312
4 3
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http://hotfile.com/dl/62153065/743bb8f/Speed.pdf.html




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