3. Addition
4. Subtraction
6. Division
7. Fractions
8. Measurement
8.2.1. Metric Units of Weight
8.2.3.1. Convert Weights into Grams
8.2.3.3. Convert Weights into Kilograms
8.2.5. Word Problems on Weights
9. Time
10. Geometry
11. Symmetry
12. Data Handling