Grade 1: The Relationship Between Addition and Subtraction (CCSSM Version)

Concepts Solve Missing Addend Situations Make Connections Between Addition and Subtraction Addition and Subtraction as Doing and Undoing Amounts Unit includes 17 high-level tasks with associated QuickStarts, Practices, Applications, and Quick Writes. 3 checkpoints and 6 support activities. 1 final performance-based assessment with scoring guide. Students Solve addition and subtraction situations to 20 with the unknown in different locations in the problem. Compare and differentiate between situations that involve action and situations that involve work with static sets. Realize that in some situations a part is the unknown, and in some situations the whole is the unknown. Develop and use different problem-solving strategies for different types of problem situations.