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This has the effect of producing a denominator in the answer that has each of the original denominators as factors. You don't have to worry about simplifying the fractions before multiplying. Of course, you may have to simplify after multiplying. There's no way out.

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โˆ™ 2009-12-11 15:14:07
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Q: When you multiply fractions why do you multiply the fractions strait across?
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Related questions

What is the difference between cross and across?

When you add or subtract fractions you cross multiply and when you multiply or divide fractions you across multiply.


How can one multiply fractions without a calculator?

You multiply the numerators across and put that as the numerator of your answer, then multiply the denominators of the fractions across the put that as the denominator of your answer. It is very easy.


What are the steps to multiplying fractions?

you multiply the top numbers straight across, then you multiply the bottom numbers straight across


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You multiply straight across. Let's take one half and two halves for example. Multiply across, and you get three quarters.


What is the answer when you multiply fractions?

If you have x/y multiplied by a/b then you get xa/yb. You just multiply across the top and bottom.


How do you multiply frations in math problems?

When you multiply fractions just line them up (denominator and denominator, numerator and numerator) then multiply across. Simplify.


Do you have to find the common denominator when you are multiplying fractions?

no. you can multiply straight across in fraction multiplication


How do you multiply two fractions with different denominator?

Well you don't you just multiply right across lets say the problem was 1/4 * 1/2 it would 1/8.So you multiply across.


What does it mean to multiply and divide fractions?

multiply and divide fractions!-.-


How do you divide fractionns?

To divide fractions, turn the second fraction upside down and multiply across.


How do you divide mixed fractions by mixed fractions?

make each fraction a improper fraction the flip the second fraction and multiply straight across then simplify


What is an algorithm for multiplying fractions?

Multiply straight across and cross reduce when necessary


How can you use models to multiply fractions?

No, you cannot use models to multiply fractions!!


How do you multiply fractions without even fractions?

Just straight across. 1/3 * 1/13 = 1/39 =======and with any multiplication of fractions


What is the state rule for dividing fractions?

Take the 2nd fraction, switch the denominator with the numerator, multiply across, simplify.


How do you find volume with fractions?

You multiply the fractions


Do you need common denomonators when mutiplying fractions?

No! You can multiply fractions without common denominators. For example: 2/4 + 7/1 Multiply straight across. The answer is then 14/4 or 3.5


How do you multiply and divide dissimilar fractions?

The dissimilarity of the fractions doesn't matter. To multiply two fractions, multiply the numerators together, then the denominators, then put the new numerator over the new denominator. Simplify if you can. To divide fractions, invert the second fraction and multiply as just described.


Do you multiply the denominator when you multiply fractions?

Yes you do.


Approximately how far is it across bass strait?

It is approximately 240 km across Bass Strait


When multiplying two mixed numbers what do you do first?

First you change them into improper fractions. Then you multiply the numerator and the denamanator straight across. ;)


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When you divide by fractions, you invert and multiply.


When you multiply fractions do you multiply the denominator?

yes. you multiply the numerator and denominator


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Yes.


Do you ever multiply a fraction?

Yes, there are times when you multiply fractions.