1. Реши примеры: 3 + 7 = □; 4 + 6 = □; 2 + 8 = □; 4 + 5 = □; 8 + 1 = □; 9 + 5 = □; 6 + 7 = □; 6 + 3 = □; 7 + 5 = □; 6 + 6 = □; 8 + 7 = □; 7 + 2 = □.

Вычислим суммы:

3 + 7 = 10; 4 + 6 = 10; 2 + 8 = 10; 4 + 5 = 9.

8 + 1 = 9; 9 + 5 = 14; 6 + 7 = 13; 6 + 3 = 9.

7 + 5 = 12; 6 + 6 = 12; 8 + 7 = 15; 7 + 2 = 9.