8. 7.3 + 9 4.7 - 14 9 : 3 + 4 14 : 2 · 7 49 - 8.5 30 - (19 + 7) 8.8 60 + 5 81 : 9 10

Решение:

1. \( 7 \times 3 + 9 = 21 + 9 = 30 \)
2. \( 4 \times 7 - 14 = 28 - 14 = 14 \)
3. \( 9 : 3 + 4 = 3 + 4 = 7 \)
4. \( 14 : 2 \times 7 = 7 \times 7 = 49 \)
5. \( 49 - 8.5 = 40.5 \)
6. \( 30 - (19 + 7) = 30 - 26 = 4 \)
7. \( 8.8 \times 60 + 5 = 528 + 5 = 533 \)
8. \( 81 : 9 \times 10 = 9 \times 10 = 90 \)

Ответ: 30; 14; 7; 49; 40.5; 4; 533; 90.