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"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

Brandie K.

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"My students loved this resource! They were engaged and were able to complete the tasks with ease."

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"I have enjoyed every purchase I've made from your store. The students are always so engaged!"

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Kiwiland Education

Multiplication & Division CSI Mystery Worksheets | Grades 3–5 | Zombie Raid

$4.50 USD

Halloween multiplication and division CSI math worksheets with a zombie on the loose: Zombie Raid is a CSI Mystery Detective case for October, plus multi-digit addition and subtraction. Something in the cemetery took the dare nobody takes, and came out. The mystery for 4th grade and 5th grade is which zombie, and its eye color, the age it died and the rest of the description surface one problem at a time. Each correct answer strikes a suspect off the line-up, which is why the work gets checked. Color and black-and-white pages, answer keys, print and go. Students color the correct arrow and follow a path to the final total.

The Case: Zombie Raid

On the paper round you always pedal a bit faster past the cemetery. Everyone does. Your friends dare each other to cut through it and nobody ever takes the dare. Today something took it the other way, and came out. Your students have the eye color, the age it died and the rest of the description to work out, one problem at a time.

What's Inside

  • Multiplication used to color the correct arrow to the next clue
  • A matching page where the line drawn passes through the letter that matters
  • Addition with three-digit and four-digit numbers
  • Subtraction with large multi-digit numbers
  • Addition and subtraction along a path where the final total settles the clue
  • Full color and black-and-white versions of every page
  • Answer keys for the whole case

What Is a CSI Mystery Detective Case?

Take a math escape room, remove the locks and the app, and put a suspect list in their place: that is a CSI Mystery Detective case. Students solve the page, each right answer clears one name, and the last one standing is the arrest. Nothing is prepared, cut or installed. Ordinary math worksheets let a class coast; detective activities do not, because a single wrong answer leaves a description matching nobody. It works as a math activity, in math centers, or as something to hand a substitute.

When to Use This Resource

  • Halloween week in October, when a normal worksheet will not hold them
  • Multiplication and division review before or after a unit
  • Math centers, early finishers and independent work
  • Emergency sub plans that run themselves
  • End of year review, when attention is thin and the work still has to happen

Grade Levels

Built for 4th grade and 5th grade. Fourth graders usually pair up on the four-digit subtraction; fifth graders run the case independently. It also gives 6th grade students who need multiplication and division review something worth doing.

Why Teachers Love CSI Mystery Detective Cases

  • Zero prep - print and hand out
  • Self-checking by design, because a wrong answer breaks the deduction
  • A Halloween activity that still does real math
  • Works as a whole lesson, a center, or a filler for an awkward afternoon

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  • Thank you from Kiwiland Education

"Great resource, low prep, easy to use, and fun! Thank you for sharing this! Highly recommend to other teachers!"

Brandie K.

Verified buyer

"My students loved this resource! They were engaged and were able to complete the tasks with ease."

Gina H.

Verified buyer

"I have enjoyed every purchase I've made from your store. The students are always so engaged!"

Karen C.

Verified buyer

How CSI Math Mysteries Work

CSI Math Mysteries turn regular math practice into a clue-based investigation. Students solve problems, use their answers as evidence, and eliminate suspects until the case is solved.

1

Read the Case

Students begin with a short mystery scenario and find out what needs to be solved.

2

Solve the Clues

Each clue gives students focused math practice using the target skill for that resource.

3

Eliminate Suspects

Students use their answers to remove suspects from the investigation one clue at a time.

4

Crack the Case

By the end, only one suspect remains and students can reveal the answer to the mystery.

No apps, locks, passwords, or student logins are required. Just print and go.

New to the format? Read What Is a Math Mystery? for how they work and how to run one in class.

Why Teachers Use CSI Math Mysteries

CSI Math Mysteries turn skill practice into a clue-based investigation students want to solve. They are easy to prep, flexible for different classroom routines, and help students practice math skills while using logic, reasoning, and careful problem solving.

Teacher-Friendly Review

Practice that feels like a mystery, not another worksheet.

CSI Math Mysteries help students stay focused by turning skill practice into a clue-based case. They are easy to prep, simple to use, and flexible enough for busy classroom routines.

No-Prep and Print-and-Go

Use the pages right away for review, math centers, sub plans, small groups, early finishers, or homeschool math.

Encourages Careful Thinking

Students need accurate answers to eliminate suspects, which encourages checking, reasoning, and attention to detail.

Easy to Fit Into Lessons

Use a full mystery in one session or split the clues across centers, partner work, intervention, or review rotations.

Builds Student Confidence

The mystery format gives students a clear purpose for practicing math skills and helps make review feel more rewarding.

CSI Math Mysteries combine focused math practice with problem solving, logic, and a detective-style task that students can complete independently or with support.

More like this

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Frequently Asked Questions For CSI Math Mysteries

Printable CSI Math Mystery worksheets that turn math practice into clue-based detective investigations.

Is this CSI Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the CSI Math Mystery on paper. No physical item will be shipped.

Do students need apps, locks, passwords, or logins?

No. Students do not need apps, locks, passwords, or logins. Teachers can print the pages and use the CSI Math Mystery straight away.

How do students solve the CSI Math Mystery?

Students solve math clues and use their answers to eliminate suspects. Each correct answer helps them narrow down the case until only one suspect remains.

Can this CSI Math Mystery be used for sub plans?

Yes. CSI Math Mysteries work well for sub plans because students can work through the clues independently, with a partner, or in small groups.

Can this CSI Math Mystery be used for homeschool?

Yes. This printable CSI Math Mystery can be used for homeschool lessons, tutoring, review practice, enrichment, or extra math support.

Will this work for early finishers or math centers?

Yes. CSI Math Mysteries are a good fit for early finishers, math centers, small groups, independent work, review lessons, and extra practice activities.

Zombie raid CSI mystery detective multiplication division grade 4

Multiplication & Division CSI Mystery Worksheets | Grades 3–5 | Zombie Raid

$4.50

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