7/13 : 14/2 : 1/26 =
7/13 : 14/2 : 1/26 =
7/13 x 2/14 x 26= 7/13 x 1/7 x 26 = 1/13 x 1 x 26 = 2
Devi solo fare il reciproco e semplificare
$\dfrac{7}{13} ÷ \dfrac{14}{2} ÷ \dfrac{1}{26}$ =
$\dfrac{7}{13} ÷ \dfrac{7}{1} ÷ \dfrac{1}{26}$ =
$\dfrac{7}{13} × \dfrac{1}{7} × \dfrac{26}{1}$ =
$\dfrac{1}{1} × \dfrac{1}{1} × \dfrac{2}{1}$ =
= $2$