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 23
3* 3+2/3
11/3
Notice that we can also rewrite integers as improper fractions.
8 = 8/1
When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators.
8/1 - 11/3
Since 3 is a multiple of 1, we can multiply both the numerator and denominator of 81 by 3 to create a common denominator.
