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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
3
11
+
4
14
Explanation
Remember, we cannot add fractions until the denominators are same. So, we have to find the least common denominator.
Least Common Denominator (LCD) of 11 and 14 is 154.
Now, we have to make sure both fractions have the same new denominator 154.
You can write fraction
3
11
as
3x14
11x14
=
42
154
You can write fraction
4
14
as
4x11
14x11
=
44
154
Now, both fractions have same denominator and we are ready to add
42
154
+
44
154
=
42+44
154
=
86
154
That can be simplified to
=
43
77
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