Найди ошибки в решении примеров и реши их правильно.
52 : 13 = 2;
40 * 20 = (4 * 2) * 10 = 80;
120 : 3 = 12 д : 3 = 4;
14 * 6 = (10 + 4) * 6 = 10 * 6 + 4 = 64;
98 : 7 = (70 + 28) : 7 = 70 + 28 : 7 = 74;
450 : 90 = 45 д : 9 д = 5 д = 50.
52 : 13 = 4, так как 4 * 13 = (10 + 3) * 4 = 10 * 4 + 3 * 4 = 40 + 12 = 52;
40 * 20 = (4 * 2) * (10 * 10) = 8 * 100 = 800;
120 : 3 = 12 д : 3 = 4 д = 40;
14 * 6 = (10 + 4) * 6 = 10 * 6 + 4 * 6 = 60 + 24 = 84;
98 : 7 = (70 + 28) : 7 = 70 : 7 + 28 : 7 = 10 + 4 = 14;
450 : 90 = 45 : 9 = 5.