3. Estimation
6. Integers
7. Fractions
9. Decimals
11. Unitary Method
12. Percentage
13. Profit and Loss
14. Simple Interest
15. Exponents
18. Mensuration
19. Geometry
19.1. Lines and Angles
19.2. Triangles
19.3. Congruence
19.3.1. Understanding the Meaning
19.3.2. Congruence of Triangles
22. Probability
23. Data Handling
Japan