Meaning & use
cross-multiply
To multiply the numerator of one fraction by the denominator of another to compare or solve equations.
See it in a sentence
To solve for x, cross-multiply the two fractions and simplify the equation.
The teacher showed students how to cross-multiply when comparing fractions with different denominators.
A note on using this word
Cross-multiplying is a shortcut used mainly to solve proportions and equations that contain fractions on both sides.
Words with a similar meaning
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