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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
1
11
+
2
12
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 12 is 132.
Now, we have to make sure both fractions have the same new denominator 132.
You can write fraction
1
11
as
1x12
11x12
=
12
132
You can write fraction
2
12
as
2x11
12x11
=
22
132
Now, both fractions have same denominator and we are ready to add
12
132
+
22
132
=
12+22
132
=
34
132
That can be simplified to
=
17
66
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