Subtraction Book 13
Focuses on subtracting 12 (12-12 to 24-12)
This Book Includes one new subtraction fact each day, (32 pages, 40 daily problems, 14 days of practice, 550 problems per book, 6,500+ per series), handwriting aids, cumulative practice, daily achievements stars, and a completion certificate.
Perfect for students in grades 1-4, ages 7+, who have mastered addition and subtraction Book 11, subtracting '11'.
Learning Objectives Subtraction proficiency, legible handwriting, number sense, and independent learning.
Best when used after the “Addition & Counting” or “Addition” series.