Вычислить удобным распределительным способом: 560*188-880*56

Раскройте скобки, поставьте сказуемые в нужную форму.
1. On Sundays I usually (to go) for a walk.
2. The bank (to open) at 9 o'clock.
3. At weekends he (not to get up) early.
4. Last Friday we (to play) tennis.
5. My mother always (to have) much work about the house.
6. My sister (to finish) school not long ago.
7. She (to study) well but her brothers (not to study) very well.

известно ,что а> 0.Сравнить а и 7/6 а, 7/12 а и 3/5 а