Smart Abacus™ PreK-Grade 1 (Free) – Addition and Subtraction

The Abacus That Teaches Children Addition and Subtraction The new, revolutionary way for kids to learn adding and subtracting! Smart Abacus™ teaches children in Grades PreK-1 addition, subtraction, and how to write numerals. The app is revolutionary in its simplicity! This hand-on approach uses colorful, fun, step-by-step lessons and provides plenty of guided practice. Children learn basic addit…