7. Fractions
8. Decimals
10. Rounding
12. Percentage
13. Unitary Method
14. Measurement
15. Time
16. Money
17. Geometry
17.2. Angles
17.2.1. The concept of angles
17.2.2. Naming an angle
17.2.3. Comparison of angles
17.2.4. Measuring angles
17.2.5. Classification of angles
17.2.6. Pairs of related angles
17.2.8. More about angles
17.4. Shapes and Curves
17.5. Triangles
17.6. Circles
17.7. Area and perimeter
17.8. Solids
18. Data Handling