Addition Math Whodunit Worksheets
These free printable addition math whodunits (grades 1–4) turn addition practice into a whodunit: kids solve addition problems to decode clues and unmask the culprit. Every case has one verified solution, prints in a click, and is free. Make one now →
199 addition cases to print
Click any case to solve online or print the PDF + answer key.
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FAQ
Are these addition math whodunits free to print?
Yes — free to solve online and free to download as a printable PDF, with a built-in answer key and no login.
How does a math mystery work?
Kids solve math problems to decode clues, then use the clues to cross suspects off a grid until one culprit remains. The math is the key; the mystery is the motivation.
Can I make a new addition case?
Yes. Generate a brand-new mystery in about a minute — pick the grade, reading level, and interests, and it's verified to have exactly one solution before you print it.
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