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Mathematics - Elementary Curriculum Mathematics Grade 2
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Strand: OPERATIONS AND ALGEBRAIC THINKING (2.OA)

Represent and solve problems involving addition and subtraction (Standard 2.OA.1). Fluently add and subtract within 20 (Standard 2.OA.2) and work with equal groups of objects to gain foundations for multiplication (Standards 2.OA.34).

Standard 2.OA.2

Fluently add and subtract within 20.

  • Building Toward Fluency
    The purpose of this task is to promote certain addition strategies that will help students learn to fluently add and subtract within 20.
  • Grade 2 Math Module 1: Sums and Differences to 100 (EngageNY)
    Module 1 sets the foundation for students to master sums and differences to 20. Students subsequently apply these skills to fluently add one-digit to two-digit numbers at least through 100 using place value understanding, properties of operations, and the relationship between addition and subtraction.
  • Grade 2 Unit 2: Becoming Fluent with Addition and Subtraction (Georgia Standards)
    In this unit students will cultivate an understanding of how addition and subtraction affect quantities and are related to each other, will reinforce the multiple meanings for addition (combine, join, and count on) and subtraction (take away, remove, count back, and compare), further develop their understanding of the relationships between addition and subtraction, recognize how the digits 0-9 are used in our place value system to create numbers and manipulate amounts and continue to develop their understanding solving problems with money.
  • Hitting The Target Number
    The purpose of this task is to help students develop flexible strategies for adding and subtracting within 20.
  • IXL Game: Add and Subtract Numbers
    This game helps second graders fluently add and subtract within 20 using mental strategies. This is just one of many online games that supports the Utah Math core. Note: The IXL site requires subscription for unlimited use.
  • Operations and Algebraic Thinking (2.OA) - Second Grade Core Guide
    The Utah State Board of Education (USBE) and educators around the state of Utah developed these guides for Second Grade Mathematics - Operations and Algebraic Thinking (2.OA)


UEN logo http://www.uen.org - in partnership with Utah State Board of Education (USBE) and Utah System of Higher Education (USHE).  Send questions or comments to USBE Specialists - Trish  French or Molly  Basham and see the Mathematics - Elementary website. For general questions about Utah's Core Standards contact the Director - Jennifer  Throndsen.

These materials have been produced by and for the teachers of the State of Utah. Copies of these materials may be freely reproduced for teacher and classroom use. When distributing these materials, credit should be given to Utah State Board of Education. These materials may not be published, in whole or part, or in any other format, without the written permission of the Utah State Board of Education, 250 East 500 South, PO Box 144200, Salt Lake City, Utah 84114-4200.