3. Addition
4. Subtraction
6. Division
7. Fractions
8. Measurement
8.1.1. Metric Units of Length
8.1.2. Measure Using a Ruler
8.1.3.1. Convert Lengths into Centimeters
8.1.3.3. Convert Lengths into Meters
8.1.5. Word Problems on Lengths
9. Time
10. Geometry
11. Symmetry
12. Data Handling