Question

8/13×(-3/5)+(-3/5)×5/13

Answer 1

$\frac{8}{13} \times ( - \frac{3}{5} ) + ( - \frac{3}{5} ) \times \frac{5}{13} = \\ = ( - \frac{3}{5} )( \frac{8}{13} + \frac{5}{13} ) = ( - \frac{3}{5} ) \times \frac{13}{13} = \\ = - \frac{3}{5} \times 1 = - \frac{3}{5}$

Answer 2

8/13×(-3/5)+(-3/5)×5/13 = -24/65+(-3/13) = -24/65+(-15/65) = -24/65-15/65 = -39/65 = -3/5
Ответ: -3/5.