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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
4
10
+
4
15
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 10 and 15 is 30.
Now, we have to make sure both fractions have the same new denominator 30.
You can write fraction
4
10
as
4x3
10x3
=
12
30
You can write fraction
4
15
as
4x2
15x2
=
8
30
Now, both fractions have same denominator and we are ready to add
12
30
+
8
30
=
12+8
30
=
20
30
That can be simplified to
=
2
3
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