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Answered 2012-01-19 00:40:57

Nope, just when adding or subtracting.

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Do you need a common denominator multiplying fractions?


Do you need a common denominator when multiplying mixed numbers?


Do you need a common denominator for dividing and multiplying fractions?

No you do not.

Do you have to have a common denominator when your multiplying?

no u dnt need to have a common denominator.. Just multiply both the denominator and numerator of the fractions u are working on and u will arrive at the answers

What is a common denominator with 1 over 3?

Common denominators are found by multiplying one denominator with another. Since you only have one here, you need another.

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


What is the common denominator for 1734 and 15?

You can always find a common denominator by multiplying the denominators together.

Do you need a common denominator when adding subtracting multiplying or dividing?

only when adding and subtracting

How to change dissimilar fractions to similar fractions?

Note: numerator is the top part of the fraction, denominator is the bottom part. 1) Find a common denominator. It may be the least common denominator, but it need not be; just multiplying the denominators also gives you a common denominator, not necessarily the smallest one. 2) Convert each fraction so that it has this common denominator. This means multiplying numerator and denominator by the same number.

How do you identify the common denominator?

The common denominator for a set of numbers is identified by simply multiplying the numbers together. This will not be the least common denominator, but that is not what the question is about.

Do you need to change the denominator when multiplying fractions?


How do you find common denominators with dividing fractions?

When you're dividing fractions ... or multiplying thrm ... they don't need to have the same denominator.

The product of multiplying 2 or more denominators?

That's a common denominator.

When multiplying fractions when they have same common denominator do you multiply the denominators?


Why is there no common denominator when multiplying or dividing fractions?

Because it is not how multiplication or division are defined.

When multiplying fractions do you have to have a common denominator?

you don't need a CD for multiplication. only do need a common denominator duhhh* * * * *No, you do not need a common denominator for multiplication or division. But you do need it for addition or you do not. You don't need one in division either. A common denom is only used in addition and subtraction.a equation for multiplying would beA a A*a-- * -- = -----B b B*bDividing is similar, just multiply by the inverse.A a A*b-- / -- = -----B b B*aAdding and subtracting are a little more complicated. Here is a formula to make finding the common denominator easy.A a (A*b)+(a*B)-- + -- = ---------------B b B*bA a (A*b)-(a*B)-- - -- = ---------------B b B*b

What is example of a common denominator and the lowest common denominator?

You can find a common denominator of any set of denominators by multiplying them together. That result will not necessarily be the lowest common denominator. Example: 1/6 and 1/9 6 x 9 = 54 and 54 is a common denominator of 6 and 9, but the LCD is 18.

Does division need a common denominator?

No, You only need a common denominator when adding or subtracting fractions.

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.

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

no. you can multiply straight across in fraction multiplication

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!

Do you need a common denominator for all fractions before doing the order of operations?

You DO need a common denominator to add, subtract, or compare fractions. You DO NOT need a common denominator to multiply or divide fractions.

How do you get the common denominator for dividing fractions?

You don't need a common denominator to divide fractions.

How do you get the common denominator in dividing fraction?

You don't need a common denominator to divide fractions.

Find the least common denominator?

The way that you can find the least common denominator is by first multiplying the 2 bottom numbers and whatever the product is that is your common denominator. to find the smallest one, you have to keep dividing it till it is in counting order or there is an odd number.