Document# Excerpt 16: Methods for Solving Single-Digit Addition and Subtraction Problems (Appendix) (Pages 36-39)

Progressions for the Common Core State Standards for Mathematics## Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algebraic Thinking

Description: One of a series of documents describing the progression of a topic across several grade levels, informed both by research on children's development and by the structure of mathematics. Methods used for solving single-digit addition and subtraction problems Level 1. Represent situation or numerical problem with groups of objects, a drawing, or fingers. Model the situation by composing two addend groups or decomposing a total group. Count the resulting total or addend.

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