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