1.3. n Digit Numbers
1.4. Place of a Digit
1.7. Rounding Numbers
1.7.1. Rounding off numbers
1.7.1.1. Rounding off to the nearest ten
1.7.1.2. Rounding off to the nearest hundred
1.7.1.3. Rounding off to the nearest thousand
1.9. Simplification
6. Integers
7. Fractions
8. Decimals
10. Mensuration
11. Algebra
13. Symmetry