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.