Strong math skills are essential to success in school and life. Math Practice Simplified - Subtraction is designed to develop fluency with basic number combinations for subtraction. This workbook provides practice in the concepts of subtraction, from basic facts through subtracting 3-digit numbers from 4-digit numbers with regrouping. The exercises are placed on the pages so that adequate workspace is available with few visual distractions to interfere with concentration. Concepts in this eBook are based on Principles and Standards for School Mathematics as identified by the National Council of Teachers of Mathematics. Answers are provided at the back of the book.