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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
5
15
+
1
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 15 and 14 is 210.
Now, we have to make sure both fractions have the same new denominator 210.
You can write fraction
5
15
as
5x14
15x14
=
70
210
You can write fraction
1
14
as
1x15
14x15
=
15
210
Now, both fractions have same denominator and we are ready to add
70
210
+
15
210
=
70+15
210
=
85
210
That can be simplified to
=
17
42
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