1. 312.6 ÷ 20 - 238.5 ÷ 15 + 254.208 ÷ 19.86 - 119.3049 ÷ 8.91 × 50.76 ÷ 4.7 + 16.71 × 17.03 = ?

2. 12.84 + 9.5 + 117.4584 ÷ 17.96 - 9.79 = ?

3. 4.52 - 14.54 - 15.8 + 14.05 = ?

4. 7.6 × 4.2 - 12.23 = ?

5. 7.6 - 4.77 × 12.41 × 242.52 ÷ 14.1 + 2.28 = ?

6. 9.7 + 13.8 × 14.59 - 7.8 × 42.93 ÷ 8.1 × 18.66 = ?

7. 11.5 × 97.02 ÷ 9.24 + 15.5 = ?

8. 19.9 × 5.5 × 22.6149 ÷ 3.63 + 14.89 + 2.9 = ?

9. 15.6 + 15.19 - 15.15 + 7.2 = ?

10. 14.31 × 13.4 + 17.1 = ?