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efectuati 11supra 5-1 supra 10 -3suora 10 ,20s.3-5s.9-8s.3. 17s.9+8s.3-9s.9.........

Răspuns :

11/5-1/10-3/10=(22-1-3)/10=18/10=9/5
20/3-5/9-8/3=(60-5-24)/9=31/9
17/9+8/3-9/9(17+24-9)/9=32/9
11/5-1/10-3/10=22/10-1/10-3/10=18/10=9/5
20/3-5/9-8/3=60/9-5/9-24/9=31/9
17/9+8/3-9/9=17/9+24/9-9/9=41/9-9/9=32/9