Question

Se considera numarul a=28 supra9 + 80supra 90 -28 supra 36 - 10 supra 45.Aratati ca a€N.

Answer 1

a = 28/9 + 80/90 - 28/36 - 10/45
(factorul comun e 180)
a = (560 + 160 - 140 - 40)/180
a = 540/180
a = 3  Bafta multa!!

Answer 2

a= $\frac{28}{9}$ + 80/62/26/45 se simplifica 80/62 cu 2 si ramane  40/31/26/45  = $\frac{28}{9} + \frac{40}{31} + \frac{45}{26}$ = $\frac{28}{9} +$ 40 si 26 se simplifica cu 2 si ii + $\frac{20}{31} * \frac{45}{13}$ = $\frac{28}{9 }$ + $\frac{900}{403}$ =