Perform the following calculations: 1. 14 - 81 2. -27 + (-54) 3. -9 * (-12) 4. -2.52 : (-3) 5. 4.93 - 9.1 6. -5.23 * 0.1 7. -4/7 + 8 8. -5/22 - 4/11 9. 1/6 * (-3/4) 10. 1.4 - 2 3/5 11. 3 1/3 * (-0.3)

Решение:

1. 
   \( 14 - 81 = -67 \)
   
2. 
   \( -27 + (-54) = -27 - 54 = -81 \)
   
3. 
   \( -9 \cdot (-12) = 108 \)
   
4. 
   \( -2.52 : (-3) = 0.84 \)
   
5. 
   \( 4.93 - 9.1 = -4.17 \)
   
6. 
   \( -5.23 \cdot 0.1 = -0.523 \)
   
7. 
   \( -\frac{4}{7} + 8 = -\frac{4}{7} + \frac{56}{7} = \frac{52}{7} \)
   
8. 
   \[ -\frac{5}{22} - \frac{4}{11} = -\frac{5}{22} - \frac{8}{22} = -\frac{13}{22} \]
   
9. 
   \[ \frac{1}{6} \cdot \left(-\frac{3}{4}\right) = -\frac{1 \cdot 3}{6 \cdot 4} = -\frac{3}{24} = -\frac{1}{8} \]
   
10. 
    \[ 1.4 - 2\frac{3}{5} = 1.4 - 2.6 = -1.2 \]
    
11. 
    \[ 3\frac{1}{3} \cdot (-0.3) = \frac{10}{3} \cdot \left(-\frac{3}{10}\right) = -1 \]
    

Ответ: -67; -81; 108; 0.84; -4.17; -0.523; \(\frac{52}{7}\); \(-\frac{13}{22}\); \(-\frac{1}{8}\); -1.2; -1.