Descripción o resumen: Index 1. Fractions and decimals 2. Powers and roots 3. Mathematical problems 4. Geometric and arithmetic progressions 5. The lenguage of algebra 6. Equations 7. Equational systems 8. Functions and graphs 9. Linear and quadratic functions 10. Geometric problems and flat surfaces 11. Three-dimensional geometric shapes 12. Geometric transformations 13. Tables and statistical graphs 14. Statistical parameters 15. Chance and probability