Add Do Not Use a Number Line Except as a Check

Multiple Choice

Add. Do not use a number line except as a check.
- $- 7 + \left( - \frac { 1 } { 10 } \right) + \frac { 9 } { 10 }$

A) $- \frac { 31 } { 5 }$
B) $\frac { 1 } { 10 }$
C) $- 62$
D) $- 8$