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 hands-on approach uses colorful, fun, step-by-step lessons and provides plenty of guided practice. Children learn basic addition and subtraction of single digit numbers and then advance to addition of two digit numbers and subtraction involving regrouping. Grades: Preschool, Prekindergarten, Kindergarten, and 1st (First) Grade Subjects: Mathematics and Critical Thinking Author: Michael Baker Features - Video tutorial for guided instruction - Teaching mode with 5 addition lessons and 5 subtraction lessons - Teaches regrouping when subtracting - Trace your answer to learn to write numerals - Calculator mode for independent practice - Ad-free ------------------------------------ Do you enjoy this app? Please help us by reviewing it in the App Store. We are a small, family owned business made up of 15 talented, innovative, hardworking people that take great pride in the products we produce. We would love to hear your experience so we can further improve our products. Thank you!