1. Скарбничка моїх досягнень » 14

Виконай дії. 2 + 5 = 7; 3 + 6 = 9; 7 – 1 = 6; 5 – 3 = 2; 12 + 5 = 17; 23 + 6 = 29; 87 – 1 = 86; 75 – 3 = 72; 32 + 5 = 37; 43 + 6 = 49; 67 – 1 = 66; 55 – 3 = 52; 42 + 5 = 47; 63 + 6 = 69; 47 – 1 = 46; 35 – 3 = 32; 32 + 15 = 47; 53 + 16 = 69; 17 – 11 = 6; 15 – 13 = 2.