Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Your second grader needs to work on the exercises in this vertical addition workbook. Why? Because you want him/her to really get into the soul of addition. The only way to do that is to do as many age-appropriate exercises as possible. There should be emphasis on age-appropriate because you want the right mix of easy and difficult equations. Grab a copy today!