With like denominators!

3/8 + 5/8= ?  Do you know how to do this addition problem with fractions?  If you don't, then keep on reading.  Adding with like denominators is easy.  Like denominators are fractions with the same denominators.  To add like denominators you add the numerators together and you keep the denominators the same.  So if you were doing this problem: 2/6 + 3/6, the answer would be 5/6.  Here is an example that will help you see the problem.

With unlike denominators!

You might think that adding with unlike denominators is really hard.  Well if you read our directions, and follow them carefully, then you will be great at adding fractions with unlike denominators!  First, in adding unlike denominators, you have to change both fractions so they are equivalent or equal, and they both have the same denominator.  Here are the steps:
1. Figure out the
LCD or the Least Common Denominator of the denominators for the problem   3/6 +  4/5  The multiples of 6 are: 6,12,18,24,30,36. The multiples of 5 are, 5,10,15,20,25,30,35 ............ 30 is the lowest multiple for both.

2. Then, take the fraction and multiply the denominator by what it's multyplied by to get the LCD. In the fraction 3/6, you would multiply 6 (the denominator) x 5 to get the LCD of 30.  Since you multiplied the denominator x5, you have to multiply the numerator x5.  Since 3x5 = 15, the new numerator is 15.

So, 3/6 is now changed into the equivalent fraction 15/30

3.  Then,  subtract the two fractions.  15/30- 24/30= 9/30

3. Then do the same with the other fraction and add the two fractions!!!!

Here is a problem you might want to do, so you can make sure you understand how to add fractions with unlike denominators: 2/3 + 2/9 = ?

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