Odpowiedź:
3 i 3/4 * 2 i 1/9 = 15/4 * 19/9 = 95/12 = 7 i 11/12
2 i 1/5 * 3 i 3/11 = 11/5 * 36/11 = 36/5 = 7 i 1/5
4 i 7/8 * 5 i 3/11 = 39/8 * 58/11 = 1131/44 = 25 i 31/44
-2 i 4/7 * (-3 i 8/9) = -18/7 * (-35/9) = 10
-6 i 1/5 * 2 i 5/10 * 1/2 = -31/5 * 25/10 * 1/2 = -155/10 * 1/2 =- 155/20 = -7 i 15/20 = -7 i 3/4
3 i 1/13 * 1 i 1/12 * 1 i 3/4 = 40/13 * 13/1 * 7/4 = 40 * 7/4 = 280/4 = 70
