Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction

An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions. 

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Make the interactive a learning center during math rotations
  • Instruct learners to bookmark the website on their personal digital learning device so they can visit it for extra practice when time permits 
  • Have class members write their answers to question six in preparation for a whole-class discussion
Classroom Considerations
  • A free Ck-12 account is required to open the interactive 
  • Pupils should be familiar with number lines, as well as positive and negative integers 
  • This resource is only available on an unencrypted HTTP website. It should be fine for general use, but don’t use it to share any personally identifiable information
  • A color-coded number line has moveable parts to assist in solving equations 
  • When an incorrect response is chosen, the correct answer is provided 
  • Hints and additional information is available through clickable links 
  • None