Найди значение выражения $\frac{6,9-1,5}{2,4}$

1. $\frac{6.9-1.5}{2.4} = \frac{5.4}{2.4} = 2.25$ 2. $0.6 \cdot (-10)^3 + 50 = 0.6 \cdot (-1000) + 50 = -600 + 50 = -550$ 3. $\frac{2.4}{2.9 - 1.4} = \frac{2.4}{1.5} = 1.6$ 4. $-0.2 \cdot (-10)^2 + 55 = -0.2 \cdot 100 + 55 = -20 + 55 = 35$ 5. $\frac{9.4}{4.1 + 5.3} = \frac{9.4}{9.4} = 1$ 6. $\frac{6.9 + 4.1}{0.2} = \frac{11}{0.2} = 55$ 7. $\frac{4.8 \cdot 0.4}{0.6} = \frac{1.92}{0.6} = 3.2$ 8. $\frac{21}{0.6 \cdot 2.8} = \frac{21}{1.68} = 12.5$ 9. $30 - 0.8 \cdot (-10)^2 = 30 - 0.8 \cdot 100 = 30 - 80 = -50$ 10. $5.4 \cdot 0.8 + 0.08 = 4.32 + 0.08 = 4.4$ 11. $0.03 \cdot 0.3 \cdot 30000 = 0.009 \cdot 30000 = 270$ 12. $0.007 \cdot 7 \cdot 700 = 0.049 \cdot 700 = 34.3$ 13. $\frac{9.6}{1.6} = 6$ 14. $2.1 \cdot 9.6 = 20.16$ 15. $5.7 - 7.6 = -1.9$ 16. $3.2 \cdot 6.2 = 19.84$