Ответ:5/19 > 4/19, 1>7/10, 1/6 > 1/8, 1<9/8

Пошаговое объяснение:

2. 1 3/8 и 8/11,

3. 3/2 = 1 1/2, 5/4 = 1 1/4, 7/6 = 1 1/6, 9/8 = 1 1/8

4. X=5/6

5. 4 1/2, 2 3/5. 4 5/10, 2 6/10 (4 5/10+2 6/10) *2=7 1/10 * 2= 14 2/10

6. ( 2 1/4 + 3 2/3 ) : ( 8 1/2 - 1 2/5 ) * 1 1/5 = 2 3/12 + 3 8/12 ) : ( 8 5/10 - 1 4/10 ) * 1 1/5 = 5 11/12 : 7 1/10 * 1 1/5 = 56×115 = 56×1 + 1·55 = 56×65 = 5·66·5 = 3030 = 1 = 1