Как решить примеры по математике 3 класс 280:(5*8)*30-5*(12-7)*6+0:14=

1) Of. Of them2)Of. Of trees,grass,flowers and water3) In. In the activities such as tennis4)Of. Of the Royal Family5)For. For its outdoor entertaiments6)About. About somthing he believes to be important7)With. With its trees and flower

280:(5*8)*30-58(12-7)*6+0:14=280:40*30-5*5*6+0=7*30-25*6=210-150=60