CPM Homework Help : MC1 Problem 10-48

Without a calculator, add $1 + \frac { 1 } { 2 } + \frac { 1 } { 3 } + \frac { 1 } { 4 }$ and write your answer as a mixed number.

Hint:

$\frac{12}{12}+\frac{6}{12}+\frac{4}{12}+\frac{?}{12}=?$