Odpowiedź:
3 i 5/9 * 6/7 = 32/9 * 6/7 = 192/63 = 3 i 3/63
2/3 * 7/21 * 9/16 = 14/63 * 9/16 = 7/56 ( skr 14 i 16 przez 2 a 63 i 9 przez 9
(1 i 1/3)² = (4/3)² = 4/3 * 4/3 = 16/9 = 1 i 7/9
10 i 2/3 : 8/9 = 32/3 * 9/8 = 12 (skr 32 i 8 przez 8 a 9 i 3 przez 3)
7/20 : 1 i 5/9 = 7/20 : 14/9 = 7/20 * 9/14 = 63/40 = 1 i 23/40
4 i 4/11 : 3 i 1/2 = 48/11 : 7/2 = 48/11 * 2/7 = 96/77 = 1 i 19/77
6 i 1/6 : 1/6 - 2 i 1/4 : 2 = 37/6 : 1/6 - 9/4 : 2 = 6/1 - 9/4 * 1/2 = 37 - 9/8 = 296/8 - 9/8 = 287/8 = 35 i 7/8
