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Add and subtract multi-digit whole numbers through three digits with fluency by using a variety of strategies, including invented and standard algorithms and explanations of those procedures.
Remarks
Activities include mental computation.Example: For 141 - 99, the standard algorithm uses regrouping. An invented approach may be to subtract 100 and add 1 (141-100+1). Another invented approach is to add one to both the minuend and subtrahend so that you have 142 - 100, which can be done mentally.
General Information
Subject Area: X-Mathematics (former standards - 2008)
Grade: 2
Body of Knowledge: Algebra
Idea: Level 2: Basic Application of Skills & Concepts
Big Idea: BIG IDEA 2 - Develop quick recall of addition facts and related subtraction facts and fluency with multi-digit addition and subtraction.
Date Adopted or Revised: 09/07
Content Complexity Rating:
Level 2: Basic Application of Skills & Concepts
-
More Information
Date of Last Rating: 06/07
Status: State Board Approved - Archived
Related Access Points
Alternate version of this benchmark for students with significant cognitive disabilities.
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