Răspuns:
8/10=10/10-2/8
8/10=9/10-1/10
8/10=12/10-4/10
6/9=9/9-3/9
6/9=8/9-2/9
6/9=7/9-1/9
3/8+2/8=5/8
8/8-5/8=3/8