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Addition or subtraction of fractions require "like" fractions: that is, fractions with the same denominator.

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โˆ™ 2017-08-04 10:18:30
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Q: Why do you have to find a common denominator?
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Related questions

How do you keep the denominator the same?

you find the common denominator


What is the least common denominator of 9?

You need at least two numbers to find a common denominator.


Where is a denominator used?

Many places, but a common one is in adding fractions where we find a common denominator.


What is the common denominator for 1734 and 15?

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


Does NINETY have a common denominator?

You need at least two numbers to find something in common. 90 can be a common denominator of other numbers, but it can't have a common denominator all by itself.


What goes into 4 and 7 to find a common denominator?

To find a common denominator, it's what 4 and 7 go into, and that's 28.


How do you add improper fractions if the denominator can't multiply into the other denominator?

You Ned to find a larger common denominator or multiply the denominators to gain a common denominator.


How do you find common denominator?

You look at multiples of the numbers on the denominator and usually use the least common multiple.


What is the least common denominator for 9 tenths?

You need at least two fractions to find a common denominator.


Do you have to find the lcd when comparing them or can you use any common denominator?

For the sake of comparison, any common denominator will do.


Do you have to find the common denominator when you multiply?

No.


What is the common denominator of 1198?

Two or more numbers are needed to find their lowest common denominator which is the same as their lowest common multiple.


What is the largest common denominator of 20 and 15?

The is no "largest" common denominator. For any denominator you find, we can multiply it by a natural number and come up with a larger one. Do you mean LEAST COMMON DENOMINATOR?


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.


How do you find a ratio that is not proportional?

u find the common denominator


How do you find a common denominator for fractions?

You do nowt


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

no


What is the rule of adding and subtracting different denominator?

Find the lowest common denominator by finding the lowest common multiple of the denominators


How do you find the common denominator of 3 fractions?

Pick two of the fractions and find the Least Common Multiple of those two denominators. Then take that number, and find the Least Common Multiple between that and the third denominator. This number will be the Least Common Denominator between the three fractions.If you don't care to find the Least common denominator, then just take the three denominators, and multiply them together.


How are equivalent fractions used when subtracting unlike fractions?

First you find a common multiple of the denominators. The least common denominator is handy but not essential. This number will be the denominator of the answer - before simplification.For both fractions find an equivalent fraction whose denominator is this common denominator.Carry out the subtraction on the new numerators to give the numerator of the answer.Simplify the result for the final, simplified answer.First you find a common multiple of the denominators. The least common denominator is handy but not essential. This number will be the denominator of the answer - before simplification.For both fractions find an equivalent fraction whose denominator is this common denominator.Carry out the subtraction on the new numerators to give the numerator of the answer.Simplify the result for the final, simplified answer.First you find a common multiple of the denominators. The least common denominator is handy but not essential. This number will be the denominator of the answer - before simplification.For both fractions find an equivalent fraction whose denominator is this common denominator.Carry out the subtraction on the new numerators to give the numerator of the answer.Simplify the result for the final, simplified answer.First you find a common multiple of the denominators. The least common denominator is handy but not essential. This number will be the denominator of the answer - before simplification.For both fractions find an equivalent fraction whose denominator is this common denominator.Carry out the subtraction on the new numerators to give the numerator of the answer.Simplify the result for the final, simplified answer.


The common denominator 32?

You need at least two denominators to find something in common between them. If that's 3 and 2, the common denominator is 6..


Is it always necessary to find the least common denominator to compare the sizes of fractions?

When comparing fractions you must find a common denominator; by finding the least common denominator it will keep the numbers (numerators and denominator) smaller .


How would you take 8 percent make it a fraction with denominator of 100 and than break that down into a fraction in simplest terms?

You write 8 over 100: 8/100. To simplify, look for a common factor between the numerator and the denominator. If you find any, divide numerator and denominator by the common factor. Repeat, until you find no more common factors.You write 8 over 100: 8/100. To simplify, look for a common factor between the numerator and the denominator. If you find any, divide numerator and denominator by the common factor. Repeat, until you find no more common factors.You write 8 over 100: 8/100. To simplify, look for a common factor between the numerator and the denominator. If you find any, divide numerator and denominator by the common factor. Repeat, until you find no more common factors.You write 8 over 100: 8/100. To simplify, look for a common factor between the numerator and the denominator. If you find any, divide numerator and denominator by the common factor. Repeat, until you find no more common factors.


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.


What is the common denominator of 84 out of 100?

84/100 is one fraction. To find a common denominator, you need at least one more.