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Grade-4
Adding Fractions With Unlike Denominators - Word Problems
Practice Preview
Anita used
1
8
of a can of tomatoes for making pasta sauce and used
2
7
of the canned tomatoes for making soup. How much of the canned tomatoes did Anita use altogether?
(Solve and reduce the fraction.)
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 8 and 7 is 56.
Now, we have to make sure both fractions have the same new denominator 56.
You can write fraction
1
8
as
1x7
8x7
=
7
56
You can write fraction
2
7
as
2x8
7x8
=
16
56
Now, both fractions have same denominator and we are ready to add
7
56
+
16
56
=
7+16
56
=
23
56
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