Complete MathSmart (Extensive Edition)Grade 6 – Level 21. Order of Operations2. Adding and Subtracting Decimals3. Multiplying and Dividing Decimals4. Fractions5. Percents6. Fractions, Decimals, and Percents7. Ratios8. Rates9. Perimeter and Area10. Volume and Surface Area11. Angles12. Shapes13. Cartesian Coordinate Plane14. Transformations15. Patterning16. Simple Equations17. Graphs18. Probability