Пошаговое объяснение:
N 13
1.
1) 2. 13/17 - 1. 11/17 = 1. 2/17
2) 1. 2/17 + 12/17 = 1. 14/17
ответ: 1. 14/17
2.
1) 4. 5/13 + 1. 6/13 = 5. 11/13
2) 5. 11/13 - 3. 8/13 = 2. 3/13
ответ: 2. 3/13
3.
1) 5. 9/11 - 3. 5/11 = 2. 4/11
2) 2. 4/11 + 2. 3/11 = 4. 7/11
ответ: 4. 7/11
N 14
1.
х + 10/27 = 19/27 - 2/27
х + 10/27 = 17/27
х = 17/27 - 10/27
х = 7/27
2.
8/15 + х = 8/15
х = 8/15 - 8/15
х = 0
3.
5/9 + х = 7/9
х = 7/9 - 5/9
х = 2/9
N 17
1.
1) 22/37 - 7/37 = 15/37
2) 15/37 + 15/37 = 30/37
ответ: 30/37
2.
1) 17/35 - 11/35 = 6/35
2) 23/35 - 6/35 = 17/35
ответ: 17/35
3.
1) 4/15 + 7/15 = 11/15
2) 13/15 - 11/15 = 2/15
ответ : 2/15
12345,12354,12435,12453,12534,12543,13245,13425,13452,13524,13542,14235,14325,14253,14352,14523,14532,15234,15324,15243,15342,15423,15432,21345,21354,21435,21453,21534,21543,23145,23154,23415,23451,23514,23541,24135,24153,24315,24351,24513,24531,25134,25143,25314,25341,25413,25431,31245,31254,31425,31452,31524,31542,32145,32154,32415,32451,32514,32541,34125,34152,34215,34251,34512,34521,35124,35142,35214,35241,35412,35421,41235,41253,41325,41352,41523,41532,42135,42153,42315,42351,42513,42531,43125,43152,43215,43251,43512,43521,45123,45132,45213,45231,45312,45321,51234,51243,51324,51342,51423,51432,52134,52143,52314,52341,52413,52431,53124,53142,53214,53241,53412,53421,54123,54132,54213,54231,54312,54321. Всего:119 чисел.