Odpowiedź:
1. 1 2/3 * 3/20 = 5/3 * 3/20 = 1 * 1/4 = 1/4
2. 3 1/2 * 3/14 = 7/2 * 3/14 = 1/2 * 3/2 = 3/4
3. 25/26 * 2 3/5 = 25/26 * 13/5 = 5/2 * 1 = 5/2 = 2 1/2
4. 1/10 * 5 5/8 = 1/10 * 45/8 = 1/2 * 9/8 = 9/16
5. 5 2/3 * 2 3/17 = 17/3 * 37/17 = 1/3 * 37 = 37/3 = 12 1/3
6. 7 1/7 * 8 1/3 = 50/7 * 25/3 = 1250/21 = 59 11/21
7. 12 1/2 * 7 3/5 = 25/2 * 38/5 = 5 * 19 = 95
8. 5 2/11 * 2 1/57 = 57/11 * 114/57 = 1/11 * 114 = 114/11 = 10 4/11