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
8 38
8* 8+3/8
67/8
10 13
10* 3+1/3
31/3
When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
67/8 + 31/3
Since 24 is a least common denominator of 8 and 3 we can multiply both the numerator and denominator of 678 by 3 and 313 by 8 to create a common denominator. We will start with the first fraction.
