Решение:
- a) \( 9^2 : 27 + 14 : 10 - 11 = 81 : 27 + 1.4 - 11 = 3 + 1.4 - 11 = 4.4 - 11 = -6.6 \)
- b) \( 5^3 \cdot 8 : 20 - 49 : 5 + 80 = 125 \cdot 8 : 20 - 9.8 + 80 = 1000 : 20 - 9.8 + 80 = 50 - 9.8 + 80 = 40.2 + 80 = 120.2 \)
Ответ: a) \( -6.6 \), b) \( 120.2 \).