Add and Subtract Decimal Numbers: Losing Little Bits

An interactive offers five questions that challenge scholars to subtract decimals. A diagram featuring a tree and birdhouse with moveable parts is designed to assist mathematicians in finding solutions. Types of questions include multiple-choice, short answer, fill in the blank, and discussion. 

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Walk through each problem, think out loud, and call on pupils to assist in finding the solution 
  • Send the link home for additional practice outside of school 
Classroom Considerations
  • A free account to CK-12 is required to open the interactive
  • Remind participants to reset the diagram between questions

  • Feedback is provided as soon as responses are given 
  • Contains information about the concept 
  • Dialing the points to the exact location can be tricky