answersLogoWhite

0


Best Answer

To get the right answer when you add or subtract unlike fractions.

User Avatar

Wiki User

โˆ™ 2016-05-03 04:06:54
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar
Study guides
๐Ÿ““
See all Study Guides
โœ๏ธ
Create a Study Guide

Add your answer:

Earn +20 pts
Q: Why do you need to use common denominator?
Write your answer...
Submit
Related questions

Do you need a common denominator when subtracting fractions?

yes you should use a common denominator when subtracting with fractions, it makes it much easier.


Does division need a common denominator?

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


Which operations don't require a common denominator?

Addition and subtraction are the only fraction operations that need a common denominator. Multiplication, division, and exponents do not need a common denominator. In fact, it is best to use reduced fractions otherwise it gets very messy.


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.


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.


Why do you need a common denominator?

Common Denominator means that the denominators in two (or more) fractions are common, or the same. The common denominator is important because before you can add or subtract fractions, the fractions need to have a common denominator.Sometimes fractions have different denominators, like 2/3 and 3/4. If you want to add or subtract them, they need to have the same denominator. In order to do that, you find a common denominator which is the same thing as a common multiple, only with denominators.


What is the least common denominator of 9?

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


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).


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 is halfway between 1 over 4 and 1 over 2?

Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.


What is the least common denominator for 9 tenths?

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


What is the common denominator of fraction 4 5th?

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


Do you need a common denominator for dividing fractions?

No only when adding or subtracting fractions a common denominator is needed


Do you need a common denominator for divison?

No.


What is the greatest common factor of the numerator 5 and the denominator?

We will need a value for the denominator to answer that.


How do you find common denominator?

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


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.


What is the LCD for 238?

You need at least 2 numbers to get a lowest common denominator. The lowest denominator for 238 is 1, but as there is no other number in the question, there is no common denominator.


Do you need to have a common denominator when subtracting?

Yes.


Do you need a common denominator multiplying fractions?

No.


Do you need a common denominator when multyplying fractions?

No.


Do you need a common denominator to multiply fractions?

No.


What is the least common denominator for 5 over 14?

You need at least one more fraction in order to have a common denominator.


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