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CSI Mystery

Earth Day Addition & Subtraction CSI Mystery Worksheets

Grades 2–5 · The Missing Recycling Bins

3rd Grade3rd Grade Math4th Grade4th Grade Math5th Grade5th Grade MathGrade 2Grade 3Grade 4Grade 5Answer keys included

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Looking for Earth Day CSI math worksheets that make addition and subtraction fun? This printable CSI Mystery Detective is the perfect spring activity for 2nd, 3rd, and 4th grade students. Designed with Earth Day in mind, these no-prep worksheets are ideal for April math review, Earth Day classroom events, or the days around spring break and Easter.

In this engaging CSI-style mystery, students use their math skills to crack the case of the missing seed packets. With every correct answer, they eliminate a suspect and move one step closer to solving the Earth Day-themed mystery. This activity combines addition, subtraction, word problems, and regrouping practice with logic and deduction—no locks or devices needed!

This resource is perfect for:

Whether you need Earth Day math worksheets, spring-themed problem-solving tasks, or fun enrichment for early finishers, this printable CSI Mystery Detective supports classroom instruction, math centers, and even homeschool review. Teachers love using these mysteries as independent work, sub plans, or engaging end-of-week practice. Great for students who need a challenge—and fun for those who enjoy puzzles.

✅ What's Included:

  • Subtraction from 100 of 2-digit numbers
  • 3-digit addition with regrouping
  • 3-digit addition and subtraction
  • Multi-digit addition problems
  • Addition and subtraction word problems
  • Color and black-and-white worksheet versions
  • Full answer key

CSI Mystery Detective packs are a fun, escape room–style experience where students solve puzzles and eliminate suspects—no locks or devices required. Just print and go! This resource is especially useful for spring classroom review, Earth Day activities, and spiral math practice. Also great for reinforcing skills in a fun, student-led format.

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