Question

(-8/21)+(-5/7)+(+17/42)+(+9/14)

Answer 1

$( - \frac{8}{21}) + ( - \frac{5}{7}) + ( + \frac{17}{42}) + ( + \frac{9}{14}) = - \frac{8}{21} + - \frac{5}{7} + \frac{17}{42} + \frac{9}{14} = \frac{ - 16 - 30 + 17 + 27}{42} = \frac{ - 2}{42} = - \frac{2}{42} = - \frac{1}{21}$