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There are places where this term is used.

1st- to compare fractions across an equals you are multiplying each side by the product of the denominators. It looks like you multiply the numerator of the left side times the denominator of the right and put that product on the left side.

Multiply the numerator of the left times the denominator of the right and put that on the right. In algebra this is good when looking for an unknown.

2nd- when comparing fractions to see which one is bigger you can multiply up from the denominator to the other numerator and compare these numbers to see which one is bigger.

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โˆ™ 2011-12-19 16:48:56
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Q: How does cross multiplying of fractions work?
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Related questions

Why does cross multiplying with fractions work?

When cross multiplying, finding the product of the means and extremes, you are technically getting a common denominator that reduces out.


Is it necessary to cross multiply when multiplying fractions?

No.


Do you cross simplify in multiplying fractions?

65


What does cross multiplyng mean?

Cross-multiplying is when you have two fractions, and you multiply the numerator of each fraction by the other fractions's denominator. In other words, if you have two fractions a/b and c/d, cross-multiplying would be finding a*d and b*c. If a/b=c/d, then ad = bc.


When multiplying fractions do you multlply to the side or cross multiply?

Multiplying fractions is the easiest operation you can do with them. Nothing complicated is required, just multiply the top two and the bottom two. Simple as that!


What is the definition of multiplying fractions?

definition of multiplying fractions?


Why does cross-multiplying work?

I dont know the answer


Why does the butterfly method work when comparing fractions?

it works when comparing fractions by multiplying the fractions to see whitch one is greater not greater and equal


What is cross canceling in dividing fractions?

Cross canceling is a way to simplify or reduce fractions before multiplying them. For example, 2/4 x 1/6 can be reduced to 1/4 x 1/3 by cross canceling.


What is an algorithm for multiplying fractions?

Multiply straight across and cross reduce when necessary


How is multiplying rational numbers like multiplying fractions and multiplying decimals?

Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.


What are the rules for multiplying fractions?

When multiplying 2 fractions, we multiply the two numerators together and the two denominators together.


How you use the algorithm when multiplying fractions by fractions?

step by step


How is multiplying mixed numbers different than multiplying fractions?

if you have mixed numbers you make them into improper fractions before you multiply


How is dividing fractions similar to multiplying fractions?

It is similar because when you divide fractions you are technically multiplying the second number's reciprocal. (Turning the fraction the other way around)


Why don't you have to find a common denominator when multiplying fractions?

Multiplying fractions is quite different from adding them. You just multiply the numberators and the denominators separately. You can find the common denominator if you like, but in the end (after simplifying), you'll get the same result, and the additional work of finding the common denominator and converting the fractions turns out to be unnecessary. Try it out for some fractions!


Why does the method of dividing fractions work?

This is related to the fact that dividing by a number is the same as multiplying with the number's reciprocal.


Cn you help me with multiplying fractions?

No.


How do you model fractions?

ny multiplying


Do you need a common denominator multiplying fractions?

No.


Do you need to have a reciprocal when multiplying fractions?

yes


When you are multiplying fractions do you need like denominators?

No.


Do you need to change the denominator when multiplying fractions?

No.


What are you doing when you divide fractions?

Multiplying by a reciprocal


When you are multiplying fractions do you find the common denominator?

no

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