Add. Do not use a number line except as a check.
-$- \frac { 5 } { 8 } + \left( - \frac { 1 } { 5 } \right)$
A) $= \frac { 33 } { 13 }$
B) $- \frac { 33 } { 40 }$
C) $-\frac { 6 } { 13 }$
D) $\frac { 17 } { 40 }$

Question

Quizplus · Accepted Answer

To add the fractions, first find a common denominator, which is 40 in this case. Then, convert each fraction: $- \frac { 5 } { 8 } = - \frac { 25 } { 40 }$ and $- \frac { 1 } { 5 } = - \frac { 8 } { 40 }$. Adding these gives $- \frac { 33 } { 40 }$.

Add Do Not Use a Number Line Except as a Check