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PAIRED SUMS GAME—MENTAL MATH STRATEGIES

Grades: K‒4

Students play a game to hone their mental math skills. Given a collection of numbers, students pair the numbers together so that each pair sums to a given target value, like 40. The game can be customized in several ways to adjust its difficulty: the target value can be made smaller or larger, and the game can be played with or without a time limit. 

OBJECTIVES 
  • Students will develop and refine their mental math strategies for addition.
  • Through repeated play of the Paired Sums Game, students will develop fluency in solving the mental math challenges.
COMMON CORE CONNECTIONS 
Mathematical Practices

(1) Make sense of problems and persevere in solving them; (2) Reason abstractly and quantitatively; (3) Construct viable arguments and critique the reasoning of others; (5) Use appropriate tools strategically; (7) Look for and make use of structure.

Content Standards

K.OA1, 3, 4, 1.OA6, 1NBT2, 4; 2.OA2, 2NBT5, 7, 9; 3NBT2

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This activity is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License: http://creativecommons.org/licenses/by-nc-sa/3.0/. If you adapt and/or share this activity, you must attribute it to "KCP Technologies, a McGraw-Hill Education Company." You may distribute it only non-commercially under the same or similar license.


This material is based upon work supported by the National Science Foundation under KCP Technologies Award ID 0918733, with grant period September 1, 2009 through August 31, 2013. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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