Developmental Mathematics Student Workbook, Level 3. Ones. Subtraction Concepts and Basic Facts

Grade 2, Semester 1 - Level 3. Ones. Subtraction Concepts and Basic Facts Level 3. Ones. Subtraction Concepts and Basic Facts covers the concept and symbol of subtraction using the 36 subtraction facts with ones and reading and writing subtraction number sentences. Level 3 introduces the concept of zero using the 19 addition facts and 19 subtraction facts with zero.