Răspuns:
a)(17/3×4/21)×7/34=
68/12×7/34=
(simplifici 68 cu 34)
=14/12=7/6
b) (36/13×1/4):(5/26×36/7)
(simplifici 36 cu 4 si 26 cu 36)
=9/13:90/91=
9/13×91/90=7/10
c)(7/2×3/7):(6/1×19/12)=
3/2×2/19=3/19
