Вычислите: а)16*25=4*(4*25)=4*100=400 б)82*5 в)36*25 г)25*32 д)28*25 е)16*125 ж)64*125 з)75*12 и)75*45 ПЛЕЕС ПОМОГИТЕ

б) 82 * 5 = 41 * (2 * 5) = 41 * 10 = 410;в) 36 * 25 = 9 * (4 * 25) = 9 * 100 = 900;г) 25 * 32 = (25 * 4) * 8 = 100 * 8 = 800;д) 28 * 25 = 7 * (4 * 25) = 7 * 100 = 700;е) 16 * 125 = 4 * 4 * 5 * 25 = (4 * 5) * (4 * 25) = 20 * 100 = 2000;ж) 64 * 125 = 8 * 2 * 4 * 5 * 25 = 8 * (2 * 5) * (4 * 25) = 8 * 10 * 100 = 8000;з) 75 * 12 = 3 * 25 * 4 * 3 = (3 * 3) * (25 * 4) = 9 * 100 = 900; и) 75 * 45 = 3 * 5 * 5 * 3 *3 * 5 = 3³ * 5³ = 15³ = 3375.