3. Addition
4. Subtraction
7. Division
9. Patterns
10. Rounding Numbers
11. Fractions
12. Decimals
13. Money
14. Measurement
15. Unitary Method
16. Geometry
19. Symmetry
20. Time
20.1. Clock
20.1.2. Measuring Time
20.1.3. 24-Hour Clock Time
20.1.4. Use of 'AM' and 'PM'
20.1.5. Addition and Subtraction of Time
20.2. Calendar
21. Data Handling