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Expert-verified Found in: Page 634 ### Pre-algebra

Book edition Common Core Edition
Author(s) Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
Pages 183 pages
ISBN 9780547587776 # Find the sum or difference.$-\frac{7}{18}-\frac{5}{18}$

$-\frac{12}{18}$

See the step by step solution

## Step 1. Given Information.

The provided expression is $-\frac{7}{18}-\frac{5}{18}$.

## Step 2. Calculation.

Since, the denominators of the first and second fractions of the expression $-\frac{7}{18}-\frac{5}{18}$ are the same, add the numerators of both fractions to calculate the sum.

$\begin{array}{c}-\frac{7}{18}-\frac{5}{18}=\frac{-7-5}{18}\text{}\left[\text{write sum of numerators over denominator}\right]\\ -\frac{7}{18}-\frac{5}{18}=-\frac{12}{18}\text{}\left[\text{add}\right]\end{array}$

## Step 3. Conclusion.

The sum is $-\frac{12}{18}$. ### Want to see more solutions like these? 