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Grade-5
Adding Fractions With Unlike Denominators
Practice Preview
Add and write the simplified fraction :
2
7
+
1
6
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 7 and 6 is 42.
Now, we have to make sure both fractions have the same new denominator 42.
You can write fraction
2
7
as
2x6
7x6
=
12
42
You can write fraction
1
6
as
1x7
6x7
=
7
42
Now, both fractions have same denominator and we are ready to add
12
42
+
7
42
=
12+7
42
=
19
42
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