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If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.
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ProfessorAdding fractions is achieved by adding the numerators as long as the denominators are the same. When the denominators are the same the fractions are "like fractions".
With different denominators they are "unlike fractions"; to be able to add them they need to be converted in to equivalent fractions with the same denominators. They are then "like fractions" and can be added.
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What are like and unlike fractions?
Like fractions are the fractions which have the same denominator and unlike fractions are the fractions which do not have the same denominator.
Adding unlike fractions?
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.
What is a unlike fraction?
You must have 2 fractions or more to have unlike fractions. They are fractions with different denominators such as 7/8 and 1/2. Like fractions would have the same denominator like 7/8 and 4/8.
Do you need a common denominator when adding fractions?
Yes, you must convert both fractions to the same denominator to add them. Now... Do the rest of your homework yourself!
What is the procedure for adding and subtraction fracions?
1) Convert the fractions to equivalent fractions, to ensure they have the same denominator. 2) Once they have the same denominator, just add or subtract the numerators. 3) As with most problems with fractions, check whether you can simplify the final result.
