Give your students engaging practice with 4-digit addition and subtraction with regrouping worksheets in the form of fun Math Mysteries! Perfect for 3rd grade math, 4th grade math, and 5th grade math, these printable activities combine problem solving, regrouping practice, and high-interest mystery stories. Students solve 16 regrouping problems to eliminate suspects and crack the case—just like an escape room or crack-the-code activity.

These math mystery worksheets are designed for one class period and are ideal for back to school activities, first week of school, test prep, seasonal math practice (fall, winter, spring, summer), sub plans, early finishers, or end of year review.

What is a Math Mystery?

A Math Mystery is a story-driven math activity that feels like an escape room for the classroom. Instead of opening locks, students read a short mystery story, solve a series of math problems, and use each answer to eliminate suspects until the case is solved. Math Mysteries blend math fluency, problem solving, and critical thinking in an engaging format that keeps students motivated.

What’s Included

• 5 Color Math Mysteries – 4-digit addition with regrouping
• 5 Color Math Mysteries – 4-digit subtraction with regrouping
• 10 Black-and-White Versions – printer-friendly worksheets
• Answer Keys – for quick grading or self-checking
• Teacher Instructions – simple print-and-go setup
• 3 Bonus Coloring Pages – fun early finisher activities

Mystery Titles in this Pack

• Box of Chocolates
• Missing Pen
• Mystery Singer
• Acts of Kindness & Wellbeing
• Holiday Time
• Mystery Present
• Acts of Kindness
• The Missing Fruit
• Student Prize
• The Missing Book

Why Teachers Love It

• Builds mastery of 4-digit addition and subtraction with regrouping problems
• High-interest mystery stories capture student imagination
• Perfect for 3rd grade, 4th grade, and 5th grade math practice
• Works for January through December – winter snow days, spring math centers, summer review, fall back-to-school activities

Bring math to life and keep your students engaged with these story-driven addition and subtraction with regrouping math mystery worksheets!

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Kiwiland Education