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Answered 2014-01-29 03:38:57

You look for a common denominator; convert the fractions to equivalent fractions with the denominator you found; then you do the addition itself.

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Do you add and subtract like and unlike fractions in the same way?

no, to add and subtract like and unlike fractions the denominator has to be the same,


How do you add unlike fractions?

Change them to like fractions and proceed.


When you add or subtract fractions with unlike denominators why do you have to find LCM?

Because to add fractions, the denominators must be equal.


How do you add fractions with unlike denomanators?

You first convert them to equivalent fractions with a common denominator. Or you convert them to decimal fractions.


How do you add and subtract fractions with unlike denominators?

Convert them to equivalent fractions with like denominators, then proceed.


How is adding like fractions and adding unlike fractions the same?

Adding 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.


Why do you have to turn unlike fractions into like fractions to add or subtract?

because its just one of the rules of math :)


Why is it inaccurate to simplify add the numerators if two fractions with unlike denominator?

Because that is not how addition of fractions is defined.


Why do you find common denominators?

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


What is a situation where you would use LCM?

To add and subtract unlike fractions.


When do you use LCM in math?

When you want to add or subtract unlike fractions.


When do you use LCM?

When you are trying to add or subtract unlike fractions.


How does the least common multiple of two numbers help you addย fractions?

When adding unlike fractions, find the LCM of the denominators and convert them to it.


Why do you need to use common denominator?

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


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.


How are like fractions and unlike fractions different?

Like fractions have the same denominator, unlike fractions don't.


Fractions with different denominators are called?

unlike fractions


How do you add and subtract unlike positive and negative fractions?

-1/2+7/10


Why do fractions need to have unlike denominator before you add or subtract them?

The question is based on a complete misunderstanding of what is required. Unlike denominators are NOT required!


How do GCF and LCM involve with the real world?

Use the GCF to reduce fractions. Use the LCM to add and subtract unlike fractions. Carpenters work with fractions a lot.


Explain why you cannot add fractions with unlike denominators?

You can totally add fractions with unlike denominators. You have to first find the LCD (least common denominator) to make them the same denomintars. And then you can just simply add them. What you cannot do is add fractions with unlike denominators without changing them to fractions with like denominators. The reason being that you would be attempting to add fractions that are different sizes. 1/2 is not the same size as 1/3, so it would be like trying to add apples and oranges. You have to change them to a common size and that is the reason you have to find the least common denominator first. While you cannot add 1/2 and 1/3, you can add 3/6 and 2/6.


What types of problems can be solved using the GCF and LCM?

The GCF can be used to reduce fractions. The LCM can be used to add and subtract unlike fractions.


How can finding the least common multiple of two numbers help you add fractions?

When adding unlike fractions, find the LCM of the denominators and convert them to it.


What problems can be solved using gcf and LCM?

Use the GCF to reduce equivalent fractions. Use the LCM to add and subtract unlike fractions.


What are unlike fractions?

Unlike fractions are fractions having unlikedenominators, e.g., 1/4 and 1/6.