Частина 1. Номер 48
3 + 8 = 11, 2 + 9 = 11, 8 + 7 = 15;
7 + 5 = 12, 6 + 4 = 10;
11 – 5 = 6, 13 – 4 = 9, 15 – 6 = 9;
16 – 8 = 8, 14 – 9 = 5.
3 + 8 = 11, 2 + 9 = 11, 8 + 7 = 15;
7 + 5 = 12, 6 + 4 = 10;
11 – 5 = 6, 13 – 4 = 9, 15 – 6 = 9;
16 – 8 = 8, 14 – 9 = 5.