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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

5th Grade Math Review CSI Mystery Worksheets | Grades 5–6 | The Missing School Pet

$4.50 USD

Order of operations, adding and subtracting decimals, 2-digit by 2-digit multiplication, rounding decimals and long division worksheets for 5th grade all come together in one no-prep CSI Mystery Detective — a whole grade 5 math review wrapped inside a single detective case. Students work through five clue pages, crossing suspects off the chart one clue at a time, until only the missing school pet is left. Ideal for end of year review, back to school in 6th grade, math centers, morning work, early finishers, sub plans, homework and small group intervention — completely no prep, just print and go.

What's Inside

  • Evaluating two-step expressions with the order of operations, brackets included: (7 − 3) x 9, 20 + 5 x 7, 55 ÷ 5 + 29, 7 x 9 − 24
  • Adding and subtracting decimals to hundredths with the place values lined up: 85.61 + 3.1, 12.38 + 4.6, 75.13 − 9.3
  • Multiplying 2-digit by 2-digit numbers with the standard algorithm: 27 x 82, 73 x 83, 14 x 78
  • Rounding decimals to the nearest tenth and to the nearest hundredth: 25.012, 17.926, 22.03, 6.94
  • Long division — dividing 3-digit numbers by 2-digit divisors: 336 ÷ 21, 684 ÷ 36, 928 ÷ 32
  • Reading evidence off a suspect chart and eliminating suspects clue by clue
  • Decoding a coded message, tallying true and false statements, matching answers with drawn lines, shading correct answers to reveal a hidden clue, and tracing a route through a number maze

One full case to crack — The Missing School Pet. Every page prints in full color and in black and white, and a self-checking answer key is included for all five clues and the suspect chart.

What is a CSI Mystery Detective?

It's a print-and-solve math activity — like an escape room without the locks. Students work through math problems to collect evidence, eliminate suspects, and reveal who did it. It combines real skill practice with critical thinking and a detective hook that keeps the whole class engaged.

When to Use This Resource

  • End of year math review
  • Back to school review at the start of 6th grade
  • Math centers and rotations
  • Morning work and bell ringers
  • Early finishers
  • Sub plans and emergency days
  • Homework and small group intervention
  • Test prep and spiral review

Grade Levels

Designed for 5th grade. Also beneficial for advanced 4th graders ready to stretch into decimals and long division, and for 6th graders who need a confidence-building review of fifth grade number and operations.

Why Teachers Love CSI Mystery Detective packs

  • Zero prep — just print and hand out
  • Self-checking: a wrong answer garbles the coded message or dead-ends the maze, so students catch their own mistakes
  • Covers five different fifth grade standards in one activity instead of five worksheets
  • Real computation practice, not a coloring page with sums attached
  • The detective hook holds attention on the days nothing else does
  • Works as a whole-class lesson, a partner task, or independent work

Love this resource?

Follow Kiwiland Education to discover more CSI Mystery Detective packs, math review activities, and detective-themed stories for elementary classrooms.

Thank you

Kiwiland Education

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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.

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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.

Mystery detective 5th grade 5 skills review decimals multiplication long division

5th Grade Math Review CSI Mystery Worksheets | Grades 5–6 | The Missing School Pet

$4.50

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