Частина 1. Номер 28
7 + 5 = 12, 8 + 3 = 11;
6 + 7 = 13, 7 + 2 = 9;
9 + 3 = 12, 6 + 5 = 11;
16 - 8 = 8, 18 - 9 = 9;
11 - 5 = 6, 19 - 9 = 10.
7 + 5 = 12, 8 + 3 = 11;
6 + 7 = 13, 7 + 2 = 9;
9 + 3 = 12, 6 + 5 = 11;
16 - 8 = 8, 18 - 9 = 9;
11 - 5 = 6, 19 - 9 = 10.