3. Estimation
6. HCF and LCM
7. Integers
8. Fractions
10. Decimals
12. Unitary Method
13. Percentage
13.1. Conversions
13.1.3. Convert Percentage into a Ratio
13.1.4. Convert a Ratio into Percentage
13.1.6. Convert Decimal into Percentage
13.2. Percentage of a Quantity
14. Profit and Loss
15. Simple Interest
16. Exponents
19. Mensuration
20. Geometry
23. Probability
24. Data Handling
Germany