Integer Addition and Subtraction (Number Line Model)

Resources and Tools for Elementary Math Specialists and Teachers

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Integer Addition and Subtraction (Number Line Model)

This interactive Java learning tool, which was constructed using the cross-platform open educational resource GeoGebra, allows a teacher to demonstrate and explore addition and subtraction of integers from -10 to 10 with a number line model with students. Users can change the values of the first and second term using sliders. Another option models subtraction of the first term, for example, - (-4) + (-5). Check boxes allow users to show each expression, model, and answer individually.

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Contributed by: Peter Tierney-Fife - Graphical designer, Education Development Center in Maine - Publisher

Math TopicAlgebraic Thinking, Number Sense, Basic Operations, Number Concepts, Mathematical Practices, Mathematical Processes

Grade Level5, 6+

Resource TypeActivity, Interactive Media

Additional Information
- AudienceEducator, Learner
- LanguageEnglish (USA)
- Education Topic
- Interdisciplinary Connection
- Professional DevelopmentNo
- ContributorPeter Tierney-Fife - Graphical designer, Education Development Center in Maine - Publisher
- Publication Date2010-09-16
- RightsCopyright (c) 1994 - 2011 Education Development Center, Inc.
  http://www.edc.org
- AccessFree access
Standards
- Common Core State Standards for Mathematics
  Select a standards document:
- Standards for Mathematical Practice[K-12]
- Make sense of problems and persevere in solving them.[K-12]
- Reason abstractly and quantitatively.[K-12]
- Look for and make use of structure.[K-12]
- Look for and express regularity in repeated reasoning.[K-12]
- Operations and Algebraic Thinking[K - 5]
- Write and interpret numerical expressions.[5]
- 2. Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation "add 8 and 7, then multiply by 2" as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.[5]
- Expressions and Equations[6 - 8]
- Apply and extend previous understandings of arithmetic to algebraic expressions.[6]
- 3. Apply the properties of operations to generate equivalent expressions. For example, apply the distributive property to the expression 3 (2 + x) to produce the equivalent expression 6 + 3x; apply the distributive property to the expression 24x + 18y to produce the equivalent expression 6 (4x + 3y); apply properties of operations to y + y + y to produce the equivalent expression 3y.[6]

Mathlanding is a project of Maryland Public Television in partnership with The Math Forum at Drexel University
and the International Society for Technology in Education. © 2012 Maryland Public Television

Integer Addition and Subtraction (Number Line Model)

Common Core State Standards for Mathematics