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Grade-4
Subtracting Fractions With Unlike Denominators
Practice Preview
Subtract and write the simplified fraction :
2
6
-
1
10
Explanation
Remember, we cannot subtract fractions until the denominators are same. So, we have to find the least common denominator.
Least Common Denominator (LCD) of 6 and 10 is 30.
Now, we have to make sure both fractions have the same new denominator 30.
You can write fraction
2
6
as
2x5
6x5
=
10
30
You can write fraction
1
10
as
1x3
10x3
=
3
30
Now, both fractions have same denominator and we are ready to subtract
10
30
-
3
30
=
10-3
30
=
7
30
Progress Summary
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