4. Реши примеры: 2 + 5; 7 − 2; 6 + 4; 10 − 6; 3 + 5; 8 − 3; 7 + 3; 10 − 7; 4 + 5; 9 − 4; 8 + 2; 10 − 2.

\(2 + 5 = 7\)

\(7 - 2 = 5\)

\(6 + 4 = 10\)

\(10 - 6 = 4\)

\(3 + 5 = 8\)

\(8 - 3 = 5\)

\(7 + 3 = 10\)

\(10 - 7 = 3\)

\(4 + 5 = 9\)

\(9 - 4 = 5\)

\(8 + 2 = 10\)

\(10 - 2 = 8\)

Ответ: 7, 5, 10, 4, 8, 5, 10, 3, 9, 5, 10, 8.