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  • Video
    What is a Hermit Crab?

    NUMBER & OPERATIONS

    Watch a video about hermit crabs and their behavior.

  • Video
    Adding and Subtracting Decimals

    NUMBER & OPERATIONS

    Watch this math video about adding and subtracting decimals.

  • Image of hermit crab next to a large shell on a beach
    Hermit Crab House Swap

    NUMBER & OPERATIONS

    Use decimal operations to see how hermit crabs upgrade their shells.

  • PDF
    Answer Sheet: Hermit Crab House Swap

    NUMBER & OPERATIONS

    Download a blank answer sheet for this article.

    PDF
  • PDF
    Check Your Understanding: Hermit Crab House Swap

    NUMBER & OPERATIONS

    Assess your students' understanding of decimal operations.

    PDF