1. 18 - 0.8 = 17.2 2. 8 - 0.07 = 7.93 3. 12 - 1.3 = 10.7 4. 15 - 1.3 = 13.7 5. 4 - 0.004 = 3.996 6. 1 - 1.1 = -0.1 7. 15 - 0.008 = 14.992 8. 17 - 0.019 = 16.981 9. 5 - 1.5 = 3.5 10. 16 - 0.003 = 15.997 11. 11 - 0.019 = 10.981 12. 12 - 0.05 = 11.95 13. 5 - 0.07 = 4.93 14. 18 - 0.20 = 17.8 15. 17 - 0.19 = 16.81 16. 5 - 0.013 = 4.987