This online number line game for summing numbers challenges the student to find a sequence of operations with four numbers that results in a given target number. The numbers are illustrated as bouncing balls on a number line. Each bounce can be in either a positive or negative direction. The student can use a guess-and-check approach to solving the problem or a more sophisticated strategy. After finding a correct sequence and reaching the target number on the number line, the student forms the number sentence that illustrates the sequence of operations used to arrive at the target number. Instructions for using the manipulative, a description of this summing activity, and a link to the National Council of Teachers of Mathematics (NCTM) standard for number and operations are included. Copyright 2005 Eisenhower National Clearinghouse


  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
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Operations,Process skills,Number and operations,Middle School,NSDL,Grade 6,oai:nsdl.org:2200/20120114184141210T,Grade 8,NSDL_SetSpec_1007936,Addition,Subtraction,Problem solving,Informal Education,Mathematics,Education,Arithmetic,Grade 7



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