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Grade-5
Subtracting Mixed Numbers With Unlike Denominators
Practice Preview
Subtract mixed numbers. Write your answer in simplified form.
6
3
8
- 5
1
7
Explanation
Rewrite subtraction equation with whole number and fraction part separated
6 +
3
8
- 5 -
1
7
Solve the whole number parts
6 - 5 = 1
Now, solve the fraction parts
3
8
-
1
7
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
3
8
as
3x7
8x7
=
21
56
You can write fraction
1
7
as
1x8
7x8
=
8
56
Now, both fractions have same denominator and we are ready to subtract
21
56
-
8
56
=
21-8
56
=
13
56
Combine whole numbers and fraction parts
1 +
13
56
= 1
13
56
Progress Summary
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