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 * 44.
16 * 25 = 4 * (4 * 25) = 4 * 100 = 400
82 * 5 = 41 * (2 * 5) = 41 * 10 = 410
36 * 25 = 9 * (4 * 25) = 9 * 100 = 900
25 * 32 = (25 * 4) * 8 = 100 * 8 = 800
28 * 25 = 7 * (4 * 25) = 7 * 100 = 700
16 * 125 = 2 * (8 * 125) = 2 * 1000 = 2000
64 * 125 = 8 * (8 * 125) = 8 * 1000 = 8000
75 * 12 = 3 * (25 * 4) * 3 = (3 * 3) * (25 * 4) = 9 * 100 = 900
75 * 44 = 3 * (25 * 4) * 11 = (3 * 11) * (25 * 4) = 33 * 100 = 3300