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This Concept Map, created with IHMC CmapTools, has information related to: Final AddSub, plus one and plus two inverse of minus one and minus two, word problems using counting, plus one and plus two then add zero, subtract none next subtract ten, symbols such as _, Strategies to solve for missing addend, Add and Subtract within 20 using Whole Numbers requires understanding, word problems using mental math, subtract ten finally doubles, making ten inverse of making ten, add zero to develop Strategies, add ten relates to subtract ten, counting relates to Subtraction, add ten to develop Strategies, missing addend using manipulatives or drawings, number lines finally symbols, comparison, missing part, difference using manipulatives or drawings, symbols such as =, plus one and plus two to develop Strategies, add zero next add ten