Частина 1. Номер 47
15 – 7 = 8, 11 – 9 = 2;
14 – 8 = 6, 16 – 4 = 12;
16 – 1 = 15, 11 – 7 = 4;
6 + 6 = 12, 5 + 7 = 12;
9 + 5 = 14, 7 + 8 = 15.
15 – 7 = 8, 11 – 9 = 2;
14 – 8 = 6, 16 – 4 = 12;
16 – 1 = 15, 11 – 7 = 4;
6 + 6 = 12, 5 + 7 = 12;
9 + 5 = 14, 7 + 8 = 15.