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Grade-4
Adding Fractions With Unlike Denominators - Word Problems
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William put
1
7
of a can of maple syrup on pancakes and used another
2
8
of a can of maple syrup in making a milkshake. How much maple syrup did he 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 7 and 8 is 56.
Now, we have to make sure both fractions have the same new denominator 56.
You can write fraction
1
7
as
1x8
7x8
=
8
56
You can write fraction
2
8
as
2x7
8x7
=
14
56
Now, both fractions have same denominator and we are ready to add
8
56
+
14
56
=
8+14
56
=
22
56
That can be simplified to
=
11
28
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