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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
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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 does multiplying 2 fractions differ from adding 2 fractions?
4
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
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.
