crossmultiply

cross-multiply

[kraws-muhl-ti-plahy, kros-]
verb (used without object), cross-multiplied, cross-multiplying. Mathematics.
to remove fractions from an equation by multiplying each side by the common multiple of the denominators of the fractions of both sides.
Also, cross multiply.


Origin:
1950–55

cross-multiplication [kraws-muhl-ti-pli-key-shuhn, kros-] , cross multiplication, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
cross-multiply  
To multiply the numerator of one of a pair of fractions by the denominator of the other.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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