1)6 5/7- 5 2/3 = 47/7 -17/3 = 141/21 -119/21 = 22/21 = 1ц 1/21
2)11 7/15- 6 2/3, = 172/15 - 20/3 = 172/15 - 100/15 = 72/15 = 24/5 = 4ц 4/5
3) 5 6/13- 2 2/3,= 71/13 - 8/3 = 213/39 - 104/39 = 109/39 = 2 ц 31/39
4) 2 3/14- 1 1/7.= 31/14 -8/7 = 31/14 - 16/14 = 15/14 = 1ц 1/14