Definition of "cross-multiplication" [cross-multiplication]

• An instance, or the process, of cross-multiplying. (noun)

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• "Vertically and Crosswise, or “cross-multiplication,” is faster, uses less space and is less laborious than long multiplication."
• "You're just doing the cross-multiplication for ALL of the terms in (10 + 2) times (10 + 2)."
• "By the way, in cross-multiplication, you muliply the numerator of side by the denominator of the other side."