3. Addition

4. Subtraction

6. Division

7. Fractions

8. Measurement

8.1.1. Metric Units of Length

8.1.2. Measure Using a Ruler

8.1.4.1. Addition of Lengths

8.1.4.1.1. Addition of Lengths in Meters or Centimeters

8.1.4.1.3. Addition of Lengths in Kilometers and Meters

8.1.4.2. Subtraction of Lengths

8.1.5. Word Problems on Lengths

9. Time

10. Geometry

11. Symmetry

12. Data Handling