Question

(-3 1supra2+1 1supra5)+(-1 1supra2 +2 9supra10

Answer 1

$( - 3 \frac{1}{2} + 1 \frac{1}{5}) + ( - 1\frac{1}{2} + 2 \frac{9}{10}) = - 3 \times \frac{1}{2} + \frac{1}{5} + ( - \frac{1}{2} + \frac{9}{5}) = - \frac{3}{2} + \frac{1}{5} + ( - \frac{1}{2} + \frac{9}{5}) = - \frac{3}{2} + \frac{1}{5} + \frac{13}{10} = - \frac{15 + 2 + 13}{10} = \frac{0}{10} = 0$