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No. Fractions don't need the same denominator in order to multiply them.

The numerator of their product is simply the product of their numerators, and

the denominator of their product is just the product of their denominators.

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โˆ™ 2010-11-30 01:08:19
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Q: When you multiply two fractions do you need to find a common deniminator first?
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How do you divide fractions with un common denominators?

When dividing fractions, the denominators don't matter. Multiply the first fraction by the reciprocal of the second.

What is the first step to finding the lowest common denominator of two fractions?

The first step in finding the lowest common denominator of two fractions is to multiply the two denominators. Then you see if there are any smaller numbers that are divisible by both denominators.

How do you Multiply 3 fractions?

Multiply the first two together and then multiply that total by the third.

How to add fractions having similar numerators but different denominators?

The first step, to add, subtract, or compare fractions, is always to convert the fractions to equivalent fractions, that all have the same denominator. You can use one of several techniques to get the LEAST common denominator, or simply multiply the two denominators to get a common denominator (which in this case may, or may not, be the smallest common denominator).

How do you do common denominator division?

You don't need a common denominator to multiply or divide fractions.To multiply fractions, multiply the numerators and the denominators, e.g.:1/2 x 3/5 = (1/3) / (2/5) = 3/10To divide fractions, multiply the first fraction with the reciprocal of the second.1/2 divided by 5/3 is the same as 1/2 times 3/5.

How do you change a fraction so they have the same denominator?

First, find a common denominator for the two (or more) fractions. Then, for each fraction, multiply numerator and denominator by the same number (different numbers for different fractions, though), to convert to the common denominator.

How do you compare fractions that are not similar?

To compare fractions which are not similar, the fractions must be made similar by putting them over a common denominator. There are two similar ways of doing this:Find the lowest common multiple of the denominators. Multiply the first numerator by whatever number you multiply the first denominator by to get that multiple, and do the same with the second numerator and denominator. You can then compare the numerators.Multiply the first numerator by the second denominator, and the second numerator by the first denominator, and put both numerators over the product of the two denominators. You can then compare the numerators.

How do you use comparing mixed fractions?

Assuming the fractions are "normalized" (the fractional part is less than 1): First compare the integer part. If the integer part is the same, you need to compare the fractions. If the denominator of the fractions is different, you have to convert to a common denominator. The simplest way to find a common denominator is to multiply both denominators (i.e., you don't need the LEAST common denominator - any common denominator will do).

What do you do if you are multiplying three fractions?

Multiply any two of them together first and then multiply the result by the third fraction.

Is the reciprocal used to divide fractions?

In order to divide two fractions, multiply the first times the reciprocal of the second.

How do you minnous fractions?

To subtract fractions with like denominators, subtract the numerators , and write the difference over the denominator. Example : Find 45โˆ’25 . Since the denominators are the same, subtract the numerators.

How do you add fractions with unlike denomanators?

You first convert them to equivalent fractions with a common denominator. Or you convert them to decimal fractions.

How do you add fractions using the least common denomanator?

Ok. First you make sure the denominator (bottom number) is the same on all the fractions. The easiest way to do this is to multiply the denominators together, then multiply each numerator by the opposite fractions denominator. This is the easiest way to do this, you will simplify later. ONLY DO THIS IF THE DENOMINATORS ARE DIFFERENT. If they are the same just add the numerators together to get your fraction. Then simplify.

How do you subtract mixed fractions with uncommon denominators?

You must first convert the fractions to equivalent improper fractions with a common denominator.

Compare and Contrast dividing two fractions and multiplying two fractions?

To add two fractions, you must first convert them to a common denominator, which is the Least Common Multiple of the denominators of the two fractions you're adding. For example, to add 5/6 and 1/8, you convert them to the common denominator LCM(6,8)=24. Then 5/6=20/24 and 1/8=3/24 so the sum is 23/24. To multiply two fractions, you multiply the numerators together and multiply the denominators together. Thus, 5/6 * 1/8 = (5*1)/(6*8) = 5/48. If both fractions are between 0 and 1, then the sum will always be greater than the product.

When adding or subtracting fractions what should you do first?

For adding or substracting fractions first of all we should calculate the LCM( Lowest Common Multiplier) of the denominators in both of the fractions.

How do you add algebraic fractions?

First, you find the greatest common factor of the denominators. Second, you multiply the top by what you had to multiply on the bottom. Finally, you add the numerators together, NOT the denominators they stay the same, and then you would get your answer.

How do you multiply and divide mixed numbers?

First convert them into improper fractions. And then to multiply multiply both the numerators and the denominators. To divide just take the reciprocal ofthe denomiator anjd then multiply them.

What do you do when you are dividing a fraction?

When dividing a fraction you leave the first fraction as it is and you change the second fraction into a reciprocal (flip the fraction). Once you have changed the second fraction into a reciprocal, then you would simply *multiply the two fractions together. Once you multiply the two fractions then that would be your final answer. Dont forget to simplify! And remember if the fractions are mixed numbers before you do anything you must change the mixed numbers into improper fractions first! hope this helps! *If you dont know how to multiply fractions then thats a different question

How is dividing fractions different from multiplying fractions?

(3/4) x (5/9) = (3x5)/(4x9) = 15/36, that is when you multiply fractions, you multiply the numerators and form the numerator of the result and multiply the denominators and form the denominator of the result (3/4) / (5/9) = (3/4) x (9/5) = 27/20, that is when you divide fractions, you first invert the fraction by which you are dividing and then multiply the numerators and form the numerator of the result and multiply the denominators and form the denominator of the result

When adding or subtracting two fractions with denominators that are not equal what is the first step you take?

The first step to take is find the lowest common denominator of the fractions which can be done by finding the lowest common multiple of the numbers.

How do you solve the inequality of a fraction?

Basically, the same way you solve any inequality. However, it may be simpler if you multiply both sides of the inequality by the fraction's denominator first; that way, you will only have integers, and don't need to deal with fractions later on. If you have several fractions, you might multiply both sides of the fraction by the least common denominator.

Why do you multiply and divide functions?

To multiply fractions you take the first fractions top, or the numerator, times the second fractions top. This is the top to the answer. Then you take the first fractions bottom, or denominator, times the second fractions bottom. This is the answers bottom. 2/3*7/5=14/5 To divide fractions, you take the second fraction and flip it over. Then you continue the same way as multiplying fractions, taking the first fraction times the flipped over second fraction. (2/3)/(7/5)=2/3*5/7=10/21

How can you dvide fractions?

To divide a fraction by a fraction, multiply the first fraction by the reciprocal of the second one.

How do you subtract fractions in simplest form?

You first need to find a common denominator, not necessarily the least common denominator. Next, you rename the fractions according to the common denominator. Only then can you subtract the fractions. After subtraction you should simplify the answer.