Question

1 supra 20 :(-1 supra 10)-(-3 supra 5)

Answer 1

$\frac{1}{20} : ( - \frac{1}{10}) - ( - \frac{3}{5}) = \frac{1}{20} : - \frac{1}{10} - ( - \frac{3}{5}) = \frac{1}{20} \times \frac{10}{ - 1} - ( - \frac{3}{5}) = \frac{1 \times 10}{ - 20} - ( - \frac{3}{5}) = \frac{10}{ - 20} - ( - \frac{3}{5}) = - \frac{10}{20} - ( - \frac{3}{5}) = - \frac{1}{2} - ( - \frac{3}{5}) = - \frac{1}{2} + \frac{3}{5} = \frac{1}{10}$