Mastering the patterns of the 120 chart is a key tool for addition, subtraction, & place value. This set has over 80 pages of games, puzzles, and independent activities for practice with adding ten, subtracting ten, and adding & subtracting multiples of ten. This resource includes games and activities for whole class, small group, and partners, as well as independent work. All are perfect for use in math centers. Student response pages and answer keys have been included where appropriate. What