$Place value CSI Math Mystery cover for grades 2 to 6, The Three-Digit Suspect case$ $Place value CSI Math Mystery cover for grades 2 to 6, The Three-Digit Suspect case$
$CSI Math Mystery clue pages with place value and 3-digit numbers$ $CSI Math Mystery clue pages with place value and 3-digit numbers$
$Printable math detective worksheets with ordering numbers and suspect elimination$ $Printable math detective worksheets with ordering numbers and suspect elimination$
$No-prep place value math mystery with answer key included$ $No-prep place value math mystery with answer key included$

$Place value CSI Math Mystery cover for grades 2 to 6, The Three-Digit Suspect case$
$CSI Math Mystery clue pages with place value and 3-digit numbers$
$Printable math detective worksheets with ordering numbers and suspect elimination$
$No-prep place value math mystery with answer key included$

"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.

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

Karen C.

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Kiwiland Education

Place Value CSI Math Mystery Worksheets | Grades 2–6 | The Three-Digit Suspect

Name: Place Value CSI Math Mystery Worksheets | Grades 2–6 | The Three-Digit Suspect
Brand: Kiwiland Education
SKU: 3178592
Price: 4.5 USD
Availability: InStock

$4.50 USD

Bring place value review to life as a detective investigation your students will beg to finish. A three-digit number is on the loose, and only your class can place it under arrest. This printable Place Value CSI Math Mystery is built for Grades 2–6 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 place value and three-digit numbers. No apps, no prep, no fuss.

Quick Details

Grade Levels: Grades 2–6 (best for 3rd–5th; great as a back-to-school review)
Format: Printable PDF
Resource Type: CSI Math Mystery worksheets
Math Skills: Place value to 1,000, ordering 3-digit numbers, odd and even numbers, 10 more/10 less, 1 more/1 less
Pages: 13+ 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

A three-digit number is somewhere out there between 100 and 1,000, and it has no intention of turning itself in. Your students pull on their detective coats, sharpen their pencils, and report to the crime scene — the only way to identify the culprit is to follow the math.

The case opens with a coded number puzzle. Students crack it to line up their first set of suspects, then dig into the evidence: breaking numbers into hundreds, tens, and ones, ordering three-digit numbers in a police lineup, and sorting the odd suspects from the even ones. Every clue clears a few more numbers from the board.

Then the witnesses weigh in. Students work 10-more and 10-less, 1-more and 1-less clues across hundred-chart pieces to corner the final suspects — but the truth is still hiding. In the last interrogation, a completed hundreds chart forces the guilty number into the open at last.

Hand your students the evidence, point them at the suspects, and let them prove they can crack the case. The math is the only thing standing between them and the truth.

Skills Covered

Students will practice:

Place value with hundreds, tens, and ones
Ordering numbers to 1,000
Identifying odd and even numbers
10 more, 10 less, 1 more, and 1 less
Codebreaking with a number puzzle
Completing a hundreds chart
Using answers to eliminate suspects
Logic, reasoning, and problem solving

What's Included

CSI-style math mystery activity
Place value and 3-digit number clue pages
Number ordering and odd/even puzzles
10 more / 10 less and hundreds-chart puzzles
Suspect elimination activity
Answer key
Print-and-go PDF format

Best Used For

This printable CSI Math Mystery works well for:

Back-to-school math review (and all-year use)
Math centers and early finishers
Substitute teacher plans
Small groups and independent work
Homeschool math
End-of-unit review
Place value practice and reinforcement

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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.

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.

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.

Recommended Products

Keep students practicing key math skills with more clue-based printable CSI Math Mystery worksheets.

$Place value CSI Math Mystery cover for grades 2 to 6, The Three-Digit Suspect case$