cross-multiply

[ kraws-muhl-ti-plahy, kros- ]
/ ˈkrɔsˈmʌl tɪˌplaɪ, ˈkrɒs- /

verb (used without object), cross-mul·ti·plied, cross-mul·ti·ply·ing.Mathematics.

to remove fractions from an equation by multiplying each side by the common multiple of the denominators of the fractions of both sides.

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Also cross mul·ti·ply .

Origin of cross-multiply

First recorded in 1950–55

OTHER WORDS FROM cross-multiply

cross-mul·ti·pli·ca·tion, cross mul·ti·pli·ca·tion [kraws-muhl-ti-pli-key-shuhn, kros-], /ˈkrɔsˌmʌl tɪ plɪˈkeɪ ʃən, ˈkrɒs-/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for cross-multiply

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.