4. Вычисли. 5+4= 3+6= 6+7= 4+8= 10-7= 10-2= 12-5= 13-9=

Решение:

1. \( 5 + 4 = 9 \)
2. \( 3 + 6 = 9 \)
3. \( 6 + 7 = 13 \)
4. \( 4 + 8 = 12 \)
5. \( 10 - 7 = 3 \)
6. \( 10 - 2 = 8 \)
7. \( 12 - 5 = 7 \)
8. \( 13 - 9 = 4 \)

Ответ: 9, 9, 13, 12, 3, 8, 7, 4.