Adding & Subtracting Integers CSI Math Mystery Worksheets | Grades 5–9 | Monster Mummy

An archaeological dig has unearthed something that should have stayed buried — a Monster Mummy is on the loose, and only integer clues can identify it. This printable Adding & Subtracting Integers CSI Math Mystery turns integer practice into a detective investigation, built for Grades 5–9 classroom teachers, homeschool parents, and tutors who want focused math practice wrapped in a story students actually care about solving.

Students work through a series of clue pages, use their answers to eliminate suspects, and race to crack the case — all while getting meaningful practice with integer operations and problem solving. No apps, no prep, no fuss.

Quick Details

Grade Levels: Grades 5–9 (best for Grade 7)
Format: Printable PDF
Resource Type: CSI Math Mystery worksheets
Math Skills: Adding and subtracting integers (including subtracting negatives) and integer word problems
Pages: 31 pages including answer key
Best For: Math centers, sub plans, early finishers, review, small groups, and homeschool math
Tech Needed: None — no apps, locks, passwords, or student logins required

Case Summary

Deep inside a newly opened tomb, an archaeological dig has uncovered something it should have left buried. A Monster Mummy is on the loose, and the only way to identify it is to work through the clues left behind in the dust. Your students are the investigators on the case.

As CSI Math Investigators, students solve integer clues — adding and subtracting positive and negative numbers, including word problems and a maze — to gather evidence. Each correct answer helps them rule a suspect out.

With every solved clue, the suspect list shrinks until only one Monster Mummy remains.

Can your investigators crack the integers and unmask the Monster Mummy before the trail goes cold? Sharpen those pencils and solve the case.

Skills Covered

Students will practice:

• Adding positive and negative integers
• Subtracting integers (including subtracting negatives)
• Integer word problems for real-world reasoning
• A maze and puzzle pages for integer fluency
• Mixed integer operations in a final multi-step challenge
• Using answers to eliminate suspects
• Logic, reasoning, and problem solving

What's Included

• CSI-style integer mystery activity with storyline and suspect roster
• 5 integer clue pages (worksheet, maze, puzzle, word problems, final challenge)
• Teacher directions, pacing guide, and answer key
• Color and black-and-white versions
• Print-and-go PDF format

Best Used For

This printable CSI Math Mystery works well for:

• Halloween and fall math review
• Integer operations practice and test prep
• Middle school RTI or intervention
• Math centers and early finishers
• Substitute teacher plans
• Homeschool math