Пошаговое объяснение:
1) 4. 7/15 - 3. 14/25 =
4. 35/75 - 3. 42/75 = 3. 110/75 - 3. 42/75 = 68/75
2) 68/75 : (4/5)² = 68/75 : 16/25 = 68/75 * 25/16 =
17/3 * 1/4 = 17/12 = 1. 5/12
ответ: 1. 5/12
Пошаговое объяснение:
1) 4. 7/15 - 3. 14/25 =
4. 35/75 - 3. 42/75 = 3. 110/75 - 3. 42/75 = 68/75
2) 68/75 : (4/5)² = 68/75 : 16/25 = 68/75 * 25/16 =
17/3 * 1/4 = 17/12 = 1. 5/12
ответ: 1. 5/12