svetazuna 235.

а)
5 * 101 = 5 * (100 + 1) = 5*100 + 5*1 = 500 + 5 = 505,

б)
25 * 101 = 25 * (100 + 1) = 25*100 + 25*1 = 2500 + 25 = 2525,

в)
333 * 101 = 333 * (100 + 1) = 333*100 + 333*1 = 33300 + 333 = 33633