verifică dacă rapoartele de mai jos pot forma proporții urgent

a) 1×6=2×3 >>6=6 A
b) 10×5=18×3>> 50= 54 F
c)2×21=3×14>>42=42 A
d) 1/2×6=1×3 >>6/2=3>>3=3 A
e) 30×0.7=1.2=10>>70/100×30=12
2100/100=12>>21=12 F
f)0,(6)×9=0,1(3)×90
6/9×9=13-1/90×90>>6=12 F