Fracții zecimale
Calculaţi:

1 4/5:(3/4•8/21+1)-4/9

[(1/3+2/21):(1/18+1/14)-2 1/2]•8

(1/12+1/24-1/36):(1/4+3/5)•2 3/7

(3+3/8):(4/35-2/70•7/4)•4/15
Va rogggg