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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
4
14
+
5
10
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 14 and 10 is 70.
Now, we have to make sure both fractions have the same new denominator 70.
You can write fraction
4
14
as
4x5
14x5
=
20
70
You can write fraction
5
10
as
5x7
10x7
=
35
70
Now, both fractions have same denominator and we are ready to add
20
70
+
35
70
=
20+35
70
=
55
70
That can be simplified to
=
11
14
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