Aurelio Baldor Molina was an educator who sought to systematize the teaching of mathematics during a time when educational resources in Latin America were scarce and often disorganized. Teaching at the prestigious Instituto de Enseñanza Media de la Habana, Baldor recognized a need for a text that progressed logically from the concrete to the abstract.
Baldor provides at least 3–5 fully worked examples per concept. Cover the solution with paper, try it yourself, then compare. baldor aritmetica