4. Integers 
 6. Fractions 
 7. Decimals 
 9.1. Ratio 
 9.1.1. Terms of a Ratio 
 9.1.2. Equivalent Ratio 
 9.1.3. Ratio in the Simplest Form 
 9.1.5. Comparison of Ratios 
 9.1.6. Word Problems on Ratio 
 9.2. Proportion 
 10. Unitary Method 
 13. Mensuration 
 14. Geometry 
 16. Linear Symmetry 
 17. Data Handling 
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