SUBTRACTION, 13 Books (digital)

by Page A Day Math

Subtraction is available as a digital download only.
Perfect for
 students in 1st-4th grade, ages 6+, who have mastered addition facts.
Learning Objectives Subtracting 0-12 with new subtraction facts introduced in each book, daily.
Each Book has 32 pages, 40 daily problems, 14 days of practice, 550 problems per book (6,500+ per series). 
This 13-Book Series has practice and repetition to last 168 days, a fun and easy to use curriculum, handwriting aids, daily achievements stars, and a completion certificate.