Librería Samer Atenea
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
In this book, Zach teaches a plethora of mathematical topics, including addition, subtraction, multiplication, division, fractions, decimals, percentages, profit/loss questions, units of measurement, algebra, geometry, and graphing.