2. Arithematic
2.1. Numbers
2.3. Fractions
2.5. Decimals
2.6. Unitary Method
2.7. Rounding Numbers
2.7.1. Rounding off Numbers
2.7.2. Estimating Sum
2.7.3. Estimating Difference
2.7.4. Estimating Products
2.7.5. Estimating Quotients
2.8. Percentage
2.9. Profit and Loss
2.10. Simple Interest
2.12. Mensuration
2.13. Time
2.14. Data Interpretation