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1\6+4\9= 3+8\18 =11\18

Обидно.что человек ответил не по теме и получил

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