3. Addition

3.1. Addendum and Sum

4. Subtraction

6. Division

7. Fractions

8. Measurement

9. Time

10. Geometry

11. Symmetry

12. Data Handling

3. Addition

3.1. Addendum and Sum

4. Subtraction

6. Division

7. Fractions

8. Measurement

9. Time

10. Geometry

11. Symmetry

12. Data Handling