2. Addition 
 3. Subtraction 
 6. Division 
 9. Decimals 
 11.2. Shape 
 11.3.1. Map distances 
 11.3.2. Symmetry Around Us 
 11.3.3. Rotational Symmetry 
 11.3.4. Identifying Mirror Halves 
 11.3.5. Symmetry in Geometric Figures 
 11.3.6. Symmetry in Alphabets 
 11.3.7. Symmetry in Numerals 
 11.4. Geometric reasoning 
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