3. Addition

4. Subtraction

7. Division

9. Patterns

10. Rounding Numbers

11. Fractions

12. Decimals

13. Money

14. Measurement

14.1. Measurement of Length

14.1.2.1. Addition of Lengths

14.1.2.2. Subtraction of Lengths

14.1.2.2.1. Subtraction of Lengths in Meters and Centimeters

14.1.2.2.2. Subtraction of Lengths in Kilometers and Meters

14.1.3. Word Problems on Length

14.2. Measurement of Weight

14.3. Measurement of Capacity

15. Unitary Method

16. Geometry

19. Symmetry

20. Time

21. Data Handling