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cross-multiply

   Also found in: Encyclopedia 0.01 sec.
cross-mul·ti·ply (krôsmlt-pl, krs-)
intr.v. cross-mul·ti·plied, cross-mul·ti·ply·ing, cross-mul·ti·plies
To multiply the numerator of one of a pair of fractions by the denominator of the other.

cross multiplication n.

cross-multiply
To multiply the numerator of one of a pair of fractions by the denominator of the other.
Translations
cross-multiply [ˌkrɒsˈmʌltɪplaɪ] vt (Math) → fare una moltiplicazione incrociata di


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1/5 = 40/x Students are often taught to cross-multiply and solve the equation.
36:18 Ratios with different numbers can be equivalent if you can cross-multiply the ratio.
 
 
 
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