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Pre Algebra Worksheets Using an Order of Operations Whodunnit

Detective-themed mystery in which ten order-of-operations problems with parentheses, brackets and exponents each eliminate a suspect, location or method until one of each remains.
Grades
Grades 5–8, Elementary, Middle School, Homeschool Resources
Pages
15
File type
PDF
Answer key
Included

Updated Oct 19, 2026

Subject
Algebra, Math
Topic
math, algebra
Resource types
Games, Activities, Quizzes, Quizzes and Tests, Teacher Tools, Worksheets & Printables
Answer key
Included

About this resource

What's inside this resource

Order of Operations Pre-Algebra Whodunnit (Grades 5-8)

Make math practice exciting with this Order of Operations Whodunnit Mystery Activity! Students solve engaging problems to eliminate suspects, locations, and methods—turning order of operations practice into a high-interest, detective-style challenge.

What’s Included

✅ 10 order of operations math problems (task cards/stations)

✅ Interactive “Whodunnit” mystery format with clues for each answer

✅ Printable Elimination Sheet (suspects, locations, methods)

✅ Student worksheet packet for independent or group work

✅ Teacher Guide with setup instructions and differentiation tips

✅ Complete Answer Key with step-by-step solutions

✅ Final solution reveal to solve the mystery

How It Works in the Classroom

This order of operations activity keeps students engaged while reinforcing key math skills:

  • Students solve each problem using PEMDAS/GEMS rules

  • Each correct answer provides a clue to eliminate a suspect, location, or method

  • Students track progress on the elimination sheet to solve the mystery

  • Use as:

    • Math stations or rotations

    • Scoot/scavenger hunt activity

    • Whole-class challenge or small group work

    • Independent practice or sub plans

The interactive format promotes movement, collaboration, and critical thinking!

Standards & Learning Goals

Aligned to upper elementary and middle school math standards.

Students will practice:

  • Order of Operations (PEMDAS/GEMS)

  • Evaluating numerical expressions

  • Working with:

    • Parentheses and brackets

    • Exponents (squares & cubes)

    • Multi-step problem solving

  • Mathematical reasoning and accuracy

Why Teachers Love It

⭐ Highly engaging mystery-based learning format
⭐ Encourages critical thinking and perseverance
⭐ Built-in self-checking through elimination system
⭐ Easy to prep and flexible for multiple classroom setups
⭐ Perfect for grades 5–8 (especially 6th grade core practice)

Students stay motivated because they’re not just solving problems—they’re solving a crime!

Grab this Order of Operations Whodunnit Activity today and turn your math lesson into an unforgettable, high-engagement experience your students will love!

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Evaluate expressions with parentheses, brackets, fraction bars and exponents
  • Apply left-to-right order for multiplication and division, and for addition and subtraction

Teaching tips

  • The grade breakdown in the teacher's guide suggests where the activity fits as core practice, review or a warm-up.

Skills covered

  • Order of operations — students evaluate ten multi-step expressions
  • Using results as clues — students match each answer to an elimination and track it on the sheet

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Resource details

Concepts & topics

Core concepts

  • Order of operations
  • Exponents
  • Grouping symbols
  • PEMDAS

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