0
When you multiply two fractions do you need to find a common deniminator first?
AngelaAguayo
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.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
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 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.
Is the reciprocal used to divide fractions?
In order to divide two fractions, multiply the first times the reciprocal of the second.
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.
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 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 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 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).
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.
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.
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.
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.
