Заполни пропуски в таблицах, выполнив вычисления.
6 * 6 = 36;
12 * 6 = (10 + 2) * 6 = 10 * 6 + 2 * 6 = 60 + 12 = 72;
15 * 6 = (10 + 5) * 6 = 10 * 6 + 5 * 6 = 60 + 30 = 90;
20 * 6 = 120;
21 * 6 = (20 + 1) * 6 = 20 * 6 + 1 * 6 = 120 + 6 = 126.
99 : 3 = (90 + 9) : 3 = 90 : 3 + 9 : 3 = 30 + 3 = 33;
81 : 3 = (60 + 21) : 3 = 60 : 3 + 21 : 3 = 20 + 7 = 27;
60 : 3 = 20;
54 : 3 = (30 + 24) : 3 = 30 : 3 + 24 : 3 = 10 + 8 = 18;
45 : 3 = (30 + 15) : 3 = 30 : 3 + 15 : 3 = 10 + 5 = 15.