FEATURES Choose 1, 2, or 10
rows Easily move and reset beads Select 10 or 20 beads per
row Convenient grid 100 - bead string Handy annotation tools Includes 1 Single - User, 1 year license MATH TOPICS Adding Within 20 Subtracting within 20 Adding Two - Digit
Numbers Composition and Decomposition Counting Place Value Multiplication