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
3 14
3* 4+1/4
13/4
2 56
2* 6+5/6
17/6
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.
13/4 + 17/6 - 13/3
Since 12 is a least common denominator of 4, 6, and 3 we can multiply both the numerator and denominator of 134 by 3, 176 by 2, and 133 by 4 to create a common denominator. We will start with the first fraction.
