Fluently add and subtract within 10.
Operations and Algebraic Thinking
Add and subtract within 20.
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Represent addition and subtraction with objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, expressions, or equations.
Decompose numbers into two groups in more than one way by using objects or drawings and record each decomposition by a drawing or equation.
Fluently add and subtract within 20 using mental strategies.
Fluently add and subtract within 5.
For any number from 1 to 9, find the number that makes 10 when added to the given number by using objects or drawings and record the answer with a drawing or equation.