2) 4supra10=2supra5 simp.2
12supra8=3supra 2 simp.2
24supra38=12supra19 simp.2
36supra44=9supra11 simp.4
200supra400=1supra2 simp prin 200
b)3supra9=1supra3
12supra27=4supra9
21supra18=7supra6
30supra42=10supra14
120supra300=40supra100
c)15supa20=3supra4
30supra45=6supra9
35supra10=7supra2
50supra75=2supra 3
100supra200=20supra40 =4supra8
coroana plizzzz