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Kiwiland Education

2-Digit by 2-Digit Multiplication | Mystery Detective Worksheets | Grades 3–6 | Printable Detective Pack

$4.00 USD

Multi digit multiplication worksheets for 4th grade and 5th grade, 2 digit by 2 digit throughout, five math cases under Mystery Detective rules with the full algorithm on every problem. No prep, print and go, full answer keys and a black and white set, for math centers, morning work, early finishers, homework, test prep and sub plans in any month. For 4th grade and 5th grade students who know the method and need it to stick, this is 2 digit by 2 digit multiplication practice with a school mystery on every page to keep them at it. It suits a math center, a homework week or a test prep run, and the CSI Mini Mystery Detective format means students check their own work.

Two by two digit multiplication is the first time students carry a partial product and then add, and it takes practice to get steady. The case format makes that practice something they ask for, and the marking is student-led, with answer keys included. Twenty products a page and five pages of math lead to one Mystery Detective culprit at the end.

Students set out each problem with the standard algorithm, then look for the product among the clues on the right of the page. A matching clue gets crossed off. The cases are school stories, like a stolen skateboard and a box of chocolates left on the teacher's desk, and the student is the investigator. Every page checks itself as they go.

 

The Cases

  1. The Missing Skateboard - a friend's skateboard stolen
  2. Teacher Appreciation Gift - who left the teacher a gift
  3. The Singer - someone singing in the music room
  4. Chocolates - an unsigned box of chocolates
  5. Acts Of Kindness - good deeds around the school

 

What's Inside

  • Five case pages in color
  • The same five cases in black and white
  • Answer keys for every case
  • A teacher instruction page
  • 2 digit by 2 digit multiplication on every page

 

What Is a CSI Mini Mystery Detective?

Each case fits on one page. The problems are on the left and the clue lists are on the right, and every clue has a number. When an answer matches a clue, the student crosses it off. The clues that are still there at the end tell them who did it.

 

When to Use This Resource

Use these after the standard algorithm has been taught, when students need more problems to work through on their own. They're also useful the week before a multiplication test. Hand one out for morning work, send one home, or leave the set in your sub folder.

 

Grade Levels

Written for 4th grade and 5th grade. 6th graders who still need multi digit multiplication practice can use them too.

 

Why Teachers Love These Cases

  • No prep
  • Color and black and white in one download
  • Students can see when a product doesn't match
  • Five separate cases

 

Want more cases like these?

Follow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for elementary classrooms.

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How Math Mysteries Work

Each Math Mystery resource gives you five one-page cases that turn math practice into a clue-based investigation. Here's exactly how a case plays out.

CASE FILE 5 MYSTERIES

Every set is a ready-to-solve investigation

Students become the math detective. They read a story, crunch the numbers, and use their answers as evidence to rule out suspects — until only the culprit is left standing.

1
STEP 01

Read the Case

Each mystery opens with a short, themed story that sets the scene and tells students exactly what they're trying to find out — who took something, what went missing, or what really happened.

Hooks them in seconds
2
STEP 02

Solve the Problems

Students work through a set of problems built around the target skill. Every answer is a clue — so there's a real reason to get each one right.

Focused skill practice
3
STEP 03

Eliminate Suspects

Students match their answers against the suspect list and cross off names one clue at a time. Wrong math means the wrong suspect — so the activity self-checks as they go.

Self-checking built in
4
STEP 04

Crack the Case

One suspect is left — and students reveal who did it. The payoff makes review feel like a win, and they're ready to start the next case.

The satisfying reveal

See it in action

SOLVE A CLUEAnswer = 576
→
MATCH THE ANSWER576 = Bianca
→
CROSS OFFBianca
No apps. No logins. No prep. Just print, hand out, and let them investigate.

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

Why Teachers Use Math Mysteries

Skill practice that feels like a case worth solving — and a download that quietly does a lot of your planning for you.

5one-page cases per set
0prep or setup time
color & black-and-white
answer keys included

Five Mysteries in One

Every download includes five separate one-page cases — enough for a full week of practice, a center rotation, or a sub-day backup that's always ready to go.

Truly No-Prep

No cutting, laminating, apps, or logins. Print in full color or black-and-white and hand them straight out — that's the whole setup.

Self-Checking by Design

Students need the right answers to rule out the right suspects, so accuracy matters — and the included answer keys mean no grading for you.

Fits Any Routine

Use one case as a morning warm-up, or spread the five across the week for centers, partner work, early finishers, or intervention.

Keeps Students Hooked

The mystery format gives even reluctant mathematicians a reason to keep solving. Review starts to feel like a game, not another worksheet.

Differentiation-Friendly

Great for on-level practice, an extension for advanced students, or a targeted review pass for anyone who needs another go at the skill.

NO PREP PRINT & GO ANSWER KEYS INCLUDED

What's in every Math Mystery set

5 full-color mysteries 5 black-and-white versions 5 complete answer keys Print-and-go teacher page Bonus coloring page
Practice that feels like a case worth cracking.

Frequently Asked Questions About Math Mysteries

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

Is this Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the 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 Math Mystery straight away.

How do students solve the Math Mystery?

Each resource includes five one-page cases. In each one, students solve the math problems and use their answers to eliminate suspects until only one remains and the case is cracked.

Can this Math Mystery be used for sub plans?

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

Can this Math Mystery be used for homeschool?

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



2-digit by 2-digit multiplication worksheets grade 5

2-Digit by 2-Digit Multiplication | Mystery Detective Worksheets | Grades 3–6 | Printable Detective Pack

$4.00

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