61.8k views
1 vote
Perform the operation(s) and write the answer in simplest form. 3/7 +5/14

User Tim Almond
by
7.7k points

2 Answers

5 votes
3/7+5/14
6/14+5/14
11/14

11/14 is already in the simplest form.
Hope it helps.
User Alexcoco
by
7.4k points
2 votes
In order to add fractions, both fractions must have the same denominator.
A denominator is the lower number of a fraction.
In the fraction
(3)/(7), the denominator is 7.
In the fraction
(3)/(7), the denominator is 14.

Since 7 ≠ 14, you must find the LCM (least common multiple) of 7 and 14.
To do this, list the multiples of 7 and 14 separately until you find one that both numbers share.
7 • 1 = 7
7 • 2 = 14
14 • 1 = 14
The LCM of 7 and 14 is 14.

This means that the common denominator that these fractions will be converted to fit will be 14.
Since 7 • 2 = 14, which is what the denominator needs to be, you must also multiply the numerator, or upper number of the fraction, by 2.
3 • 2 = 6

(3)/(7) =
(6)/(14)

(6)/(14) and
(5)/(14) now have common denominators and you can add them together!

To add fractions with common denominators, simply add the numerators and the denominator stays the same.

(6)/(14) +
(5)/(14) =
(6 + 5)/(14)
6 + 5 = 11

(11)/(14) is sum of
(6)/(14), which is an equivalent fraction to
(3)/(7), and
(5)/(14).


Hope this helps!
User Bjacobowski
by
8.6k points