Частина 1. Номер 39
5 + 7 = 12, 4 + 8 = 12, 9 + 9 = 18;
6 + 5 = 11, 7 + 8 = 15;
15 - 6 = 9, 11 - 3 = 8, 16 - 8 = 8;
11 - 9 = 9, 14 - 7 = 7.
5 + 7 = 12, 4 + 8 = 12, 9 + 9 = 18;
6 + 5 = 11, 7 + 8 = 15;
15 - 6 = 9, 11 - 3 = 8, 16 - 8 = 8;
11 - 9 = 9, 14 - 7 = 7.