a)3/9:1/3=3/9*3/1=9/9=1
b)135-13TOTUL/90:41/45=122/90*45/41=122/41=2 INTREG SI30/41
c)25/10:3/4=25/10*4/3=100/30=3 INTREG SI 10/30
d)127-12 TOTUL/90 : 46/99=115/90 : 46/99=115/90*99/46=1265/460=2.75
e)312-3totul/99*11/206=309/99*11/206=309/1854
f)5/10*9/5=9/10
