Grade 2: Add and Subtract with Flexible Strategies (CCSSM Version)

Grade 2: Add and Subtract with Flexible Strategies (CCSSM Version)

Regular price $149.00 $0.00 Unit price per

Concepts

  • Add More than Two Two-Digit Addends
  • Addition with Three-Digit Addends
  • Subtraction with Three-Digit Numbers

Unit includes

  • 24 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

  • Develop and use flexible strategies for solving addition situations and algorithms, including
    • Decomposing by place value and then recomposing the partial sums to arrive at the total sum and
    • Rounding to make a friendly number and then compensating for the additional amounts added in/taken away.
  • Develop and use flexible strategies for solving subtraction situations and algorithms, including
    • Counting back tens and ones or by subtracting like place-value amounts,
    • Using addition with an unknown addend as a means for solving subtraction equations, and
    • Creating friendly numbers that involve decomposing the subtrahend into smaller portions that can be easily subtracted.

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