Mathematics

- Q. -4 + 8 = ?
- Q. 18 - (-7) = ?
- Q. 16 x -5 =?
- Q. 100 + -53 = ?
- Q. One morning the outside temperature was 14 degrees below zero. By noon the outside temperature had risen 18 degrees. By midnight the outside temperature had dropped 6 degrees. What was the outside temperature at midnight in degrees Fahrenheit?