Before we can evaluate a sum or difference involving mixed numbers, the mixed numbers must first be rewritten as fractions.
a bc
a* c+b/c
Simplify
11 34
11* 4+3/4
47/4
4 13
4* 3+1/3
13/3
When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
47/4 - 13/3
Since 12 is a least common denominator of 4 and 3 we can multiply both the numerator and denominator of 474 by 3 and 133 by 4 to create a common denominator. We will start with the first fraction.
