## Intermediate Algebra for College Students (7th Edition)

$-\dfrac{1}{10}$
Make the fractions similar using their LCD, which is 10, to obtain: $=\dfrac{7}{10} + \left(-\dfrac{8}{10}\right)$ The addends have opposite signs, so subtract the smaller absolute value from the bigger absolute value, andthen use the sign of the number with the bigger absolute value to obtain: $=-(\frac{8}{10} - \frac{7}{10}) \\\\ -(\frac{1}{10}) \\=-\frac{1}{10}$