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Why if there are two fraction having different denominator are you are going to find first their least common denominator?
Wiki User
∙ 7y ago
To get the right answer when you add or subtract them.
Wiki User
∙ 7y ago
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What is the LCD use for in math?
Least common denominator. Used in fractions. For example : 1/2 and 3/4 The fraction that has the lowest denominator, while still having an equivalent fraction is the LCD. In this case it would be 2/4 and 3/4. Because 1/2 = 2/4, and the lowest common denominator between the two fractions is 4. Hope this helps ! :D
Find the LCD then add or subtract?
To add or subtract fractions the denominators must be the same - then the numerators are added or subtracted with the denominator being kept the same.When adding or subtracting fractions with different denominators, the fractions must first be converted into equivalent fractions with the same denominator and then the (new) numerators can be added or subtracted as required.For the denominator for these equivalent fractions, the original denominators can all be multiplied together, but this can lead to having to work with very large numbers; a better choice for the denominator is the smallest number that all the denominators divide into, their Least Common Multiple (LCM) - this is is then used as the denominator for the equivalent fractions and is called the Least Common Denominator (LCD) of the fractions.First you find the LCD okay??? Then you have to add or subtract. What they mean by that is that once you've found your lcd add or subtract..xx hope i helped :)
Do you ever have to simplify if you find the LCD when subtracting fractions?
No because in order to subtract or add fractions the denominator of the fractions must be the same and if they are not then the lowest common denominator of the fractions must be found. Having subtracted or added the fractions then it may be possible to simplify the result.
What is the process of adding fractions?
Convert mixed fractions into improper fractions (e.g. 1 1/2 to 3/2)Find the LCM of the denominators (e.g. 60 for 1/3, 1/4 and 1/5)Convert each fraction into a form with this shared denominator (20/60, 15/60 and 12/60 for the above example) - if you are having trouble, just multiply the numerator and denominator by the other denominatorsAdd the numerators together but keep the denominator the same (47/60 for the above example)Simplify, if possible (leave as 47/60 for the above example but convert to 1/2 if the answer is 120/240)Convert into a mixed fraction, if possible or desired (e.g. 3/2 to 1 1/2)Skip any stages at the start that are unnecessary. For example, if the fractions are all less than one, start on step 2 and if they also all have the same denominator, start on step 4.
If your 10 is it common to have a period?
Periods usually happens somewhere between the ages of 9 -16 years. You have just developed faster then a lot of other girls if your having your period don't be alarmed people have periods at a lot of different ages.
What is the similar fraction?
fraction having a common denominator
What is the similar?
fraction having a common denominator
A fraction with its numerator and denominator having a greatest common factor of 1?
is said to be in its simplest form.
What is fraction having denominator as 10 or a power of 10 called?
A decimal fraction.
What are fractions that have the same denominator called?
Like Fractions
What is the way of representing a fraction having a denominator that is power of ten?
The decimal representation.
Do you have to have a common denominator when you are adding fractions?
Having a common denominator makes it easier to add or subtract fractions. You can also convert fractions to decimals and then do the addition or subtraction but that is really the same thing as having a common denominator of 10. 100. 1000. etc. Without a common denominator, you would have to mentally make adjustments for the values of fractions. Of course, that is really establishing a common denominator in your head.
What is the LCD use for in math?
Least common denominator. Used in fractions. For example : 1/2 and 3/4 The fraction that has the lowest denominator, while still having an equivalent fraction is the LCD. In this case it would be 2/4 and 3/4. Because 1/2 = 2/4, and the lowest common denominator between the two fractions is 4. Hope this helps ! :D
Meaning of dissimilar fraction?
Dissimilar fractions are not equivalent as for example 1/2 is the same as 2/4 but 3/5 and 2/7 are dissimilar fractions
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).
When having a fraction the composite number the numerator and a prime number the denominator is it simplest form?
You can be sure only if it is not a top heavy fraction. For example, 12/3 has a composite numerator and a prime denominator. But its simplest from is 4.
Why should you have common denominator when you add two fractions together?
When you have a common denominator, the 2 fractions can be added by simply adding the numerators togethr and keeping the denominator. It might be harder to visualise this process without first getting a common denominator, thus having it might allow you to have a more accurate answer.
