answersLogoWhite

0


Best Answer

You can add three fractions with different denominators the same way you add two fractions with different denominators. The only difference is that your LCD (Lowest Common Denominator) must be the same for all three fractions

  • 1/3 + 4/5 + 9/15 all have a lowest common denominator of 15
  • 3, 6, 9, 12, 15
  • 5, 10, 15
  • 15

Now simply convert all your fractions to the appropriate denominator.

  • 1/3 + 4/5 + 9/15 = 5/15 + 12/15 + 9/15

Then add like normal

  • 5/15 + 12/15 + 9/15 = 26/15

and lastly reduce or simplify if necessary

  • 26/15 = 1 11/15
User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How do you add 3 fractions with different denomenators?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Math & Arithmetic

How do you add fractions with the same dinominator?

To add fractions the denominators must be the same.When the denominators are the same, just add the numerators keeping the denominator for the result, and then simplify the result, eg 1/8 + 3/8 = 1+3/8 = 4/8 = 1/2;If the denominators are different, make the fractions into equivalent fractions with the same denominator, and then use rule 1, eg 1/3 + 1/2 = 2/6 + 3/6 = 2+3/6 = 5/64/7 + 2/7=NEVER ADD THE DENOMINATORS!So you add 4 + 2= 6Then put 6/7 Because you keep the same Denominator.Easy now you can add fractions with the same denominators! :)Hope this helps!


What is the rule in adding fractions having the same denominator?

Sum of the fractions = sum of numerators divided by their common denominator. Adding Fractions rule implies to addition of fractions having same denominator and as well as adding fractions with different denominators. So rule for adding fractions having the same denominator is add the numerators and simplify For example : 3/5 + 2/5 + 9/5 = (3 + 2 + 9)/5 [add the numerators] = 14/5


How do you add and subtract proper fractions?

If the denominators are the same, add or subtract the numerators. If the denominators are different, convert them to a common denominator and add or subtract the numerators. 2/3 - 1/3 = 1/3 4/5 - 2/3 = 12/15 - 10/15 = 2/15


How does multiplying 2 fractions differ from adding 2 fractions?

4


In how many different ways can you add 2 over 3 and 5 over 6?

There is only one way - make then into equivalent fractions with the same denominator and then add the numerators and simplify if possible. However, there are infinitely many equivalent fractions that can be used - all multiples of the lowest common multiple of 3 and 6 (which is 6) can be used as the denominator for the equivalent fractions.

Related questions

How do you add two fractions with different denominators?

sex is very nice :3


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.


How so you add fractions?

If the fractions have the same denominators, just add the numerators: 2/7 + 3/7 = 5/7 If the fractions have different denominators, it is necessary to make them the same by finding the least common denominator, and converting the fractions. Example 1/3 + 1/4 The LCD for 3 and 4 is 12. 1/3 = 4/12 1/4 = 3/12 Now that the denominators are the same, we can add the numerators. 4/12 + 3/12 = 7/12 1/3 + 1/4 = 7/12


How do you add fractions with the same dinominator?

To add fractions the denominators must be the same.When the denominators are the same, just add the numerators keeping the denominator for the result, and then simplify the result, eg 1/8 + 3/8 = 1+3/8 = 4/8 = 1/2;If the denominators are different, make the fractions into equivalent fractions with the same denominator, and then use rule 1, eg 1/3 + 1/2 = 2/6 + 3/6 = 2+3/6 = 5/64/7 + 2/7=NEVER ADD THE DENOMINATORS!So you add 4 + 2= 6Then put 6/7 Because you keep the same Denominator.Easy now you can add fractions with the same denominators! :)Hope this helps!


What is the rule in adding fractions having the same denominator?

Sum of the fractions = sum of numerators divided by their common denominator. Adding Fractions rule implies to addition of fractions having same denominator and as well as adding fractions with different denominators. So rule for adding fractions having the same denominator is add the numerators and simplify For example : 3/5 + 2/5 + 9/5 = (3 + 2 + 9)/5 [add the numerators] = 14/5


Answers to add fractions?

1/3 + 2/17


How do people add fractions?

so, if you have 1/3 plus 2/3 you just add the denominadeters so it would be 3/3


How do you know when there are five different fractions?

10 9 5 6 3 all those are 5 different fractions ---- === === === === 10 9 5 6 3 all those are 5 different fractions ---- === === === ===


How do you add and subtract proper fractions?

If the denominators are the same, add or subtract the numerators. If the denominators are different, convert them to a common denominator and add or subtract the numerators. 2/3 - 1/3 = 1/3 4/5 - 2/3 = 12/15 - 10/15 = 2/15


How does multiplying 2 fractions differ from adding 2 fractions?

4


In how many different ways can you add 2 over 3 and 5 over 6?

There is only one way - make then into equivalent fractions with the same denominator and then add the numerators and simplify if possible. However, there are infinitely many equivalent fractions that can be used - all multiples of the lowest common multiple of 3 and 6 (which is 6) can be used as the denominator for the equivalent 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.