Пошаговое объяснение:
Номер 1
1.
1) 1/6 + 4/9 = 3/18 + 8/18 = 11/18
2) 3/4 * 2/3 = 2/4 = 1/2
3) 11/18 - 1/2 = 11/18 - 9/18 = 2/18 = 1/9
2.
1) 3/8 + 5/12 = 9/24 + 10/24 = 19/24
2) 1 7/12 : 19/24 = 19/12 * 24/19 = 24/12 = 2
Номер 2
1.
х + (7 2/14 - 5 1/14) = 5 4/14
х + 2 1/14 = 5 4/14
х = 5 4/14 - 2 1/14
х = 3 3/14
2.
х : 56/90 = 15/28
х = 15/28 * 56/90
х = 1/1 * 2/6
х = 2/6
х = 1/3
Номер 3
1.
(1 1/4 * 2/5) - (1/3 * 3/4) =
(5/4 * 2/5) - (1/3 * 3/4) =
2/4 - 1/4 = 1/4
2.
(4/7 : 1 6/7) - (1/2 * 4/13) =
(4/7 : 13/7) - 4/26 =
(4/7 * 7/13) - 2/13 =
4/13 - 2/13 = 2/13
Номер 4
1) 3 - 1 9/11 = 2 11/11 - 1 9/11 = 1 2/11
2) 3 1/7 * 1 2/11 : 13/21 =
22/7 * 13/11 * 21/13 =
22/7 * 21/11 = 2/1 * 3/1 = 6/1 = 6
1\6+4\9= 3+8\18 =11\18
Обидно.что человек ответил не по теме и получил