Răspuns
Explicație pas cu pas:
a. 1/3x3/7=1/7
b. 3/4x4/3=1
c. 7/5x15/19=(7x3)/19=21/19=1si2/19
d. 5/12x18/5=6/4=3/2=1si1/2
e. 9/11x22/27=2/3
f. 2/5x6si3/7=2/5x45/7=(2x9)/7=18/7=2si4/7
g. 2si3/11x11/45=25/11x11/45=5/9
h. 1si4/5x2si1/27=9/5x55/27=11/3=3si2/3
