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3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
3 Digit Addition Math  Activity | Math Detectives | Addition Math Mystery
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What others say

"his 3 Digit Addition Math Detectives activity is such a fun and engaging way to practice addition skills! The mystery format keeps students hooked from start to finish, making them excited to solve each problem and uncover clues."
star
Rebecca C.
"My students really enjoyed this math activity. It was a nice break from traditional worksheets. Thank you!"
star
Toni B.

Description

Are you looking for a fun way to review 3-Digit Addition with your students and don't want to use basic worksheets? This 3- Digit Addition math activity is the perfect way to get your students engaged and loving math class. This math detective game is a fun way to practice three-digit addition while having a blast in class.

About Math Detectives:

Students read about a case that they as Math Detectives need to solve. Each case begins with 9 suspects. The students will use their math skills to work their way through clues left at the crime scene and clues left by the criminal as well until they're able to determine who the criminal is. Each case includes riddled notes left by the criminal that students will enjoy reading and trying to solve. Each case also includes a reading and writing extension activity that makes it easy to incorporate reading and writing into your math lesson.

What Does Each Math Detective Packet Include?

  • A case that needs to be solved with a specific math skill
  • Clues and riddles for students to read
  • 7-8 math skill practice pages that lead detectives to the next clue.
  • A detective notebook for students to take notes in and write about the case
  • A detective hat and magnifying glass to truly get into character
  • Reading and Writing Extension activity in connection with the case
  • Fun Facts scattered throughout the packet.

About This Addition Math Detective Activity:

A dinosaur bone has been stolen from the American Museum of Natural History in NYC. The New York Police Department needs an addition expert to help them solve the addition clues that the criminal has left behind. Students will start with 9 suspects and then use their answers and the criminal's clues to help them figure out who the real criminal is! Students will have a BLAST trying to solve this crime-- they won't even know their learning and practicing!

How Should You Use Math Detectives?

This math activity is perfect in just about any way you choose. You can ...

  • Use these in centers for students to complete independently or with a group.
  • Use these as a whole group activity or small group activity and solve together.
  • Send the whole packet home for a holiday packet or for homework
  • Use it as an early finisher extension activity that students can pull out when they finish their assigned work.

Whatever way you choose, it's a guaranteed way to bring some fun and excitement to your classroom with minimal to no prep.

Check out the preview for more!

Want More Math Detectives?

Check out....

Area and Perimeter Math Detectives

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Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

3 Digit Addition Math Activity | Math Detectives | Addition Math Mystery

The Blueprint Teacher
3k Followers
$4.00

Highlights

Grades icon
Grades
Standards icon
Standards
Pages
32
Answer Key
Included

What others say

"his 3 Digit Addition Math Detectives activity is such a fun and engaging way to practice addition skills! The mystery format keeps students hooked from start to finish, making them excited to solve each problem and uncover clues."
star
Rebecca C.
"My students really enjoyed this math activity. It was a nice break from traditional worksheets. Thank you!"
star
Toni B.

Description

Are you looking for a fun way to review 3-Digit Addition with your students and don't want to use basic worksheets? This 3- Digit Addition math activity is the perfect way to get your students engaged and loving math class. This math detective game is a fun way to practice three-digit addition while having a blast in class.

About Math Detectives:

Students read about a case that they as Math Detectives need to solve. Each case begins with 9 suspects. The students will use their math skills to work their way through clues left at the crime scene and clues left by the criminal as well until they're able to determine who the criminal is. Each case includes riddled notes left by the criminal that students will enjoy reading and trying to solve. Each case also includes a reading and writing extension activity that makes it easy to incorporate reading and writing into your math lesson.

What Does Each Math Detective Packet Include?

  • A case that needs to be solved with a specific math skill
  • Clues and riddles for students to read
  • 7-8 math skill practice pages that lead detectives to the next clue.
  • A detective notebook for students to take notes in and write about the case
  • A detective hat and magnifying glass to truly get into character
  • Reading and Writing Extension activity in connection with the case
  • Fun Facts scattered throughout the packet.

About This Addition Math Detective Activity:

A dinosaur bone has been stolen from the American Museum of Natural History in NYC. The New York Police Department needs an addition expert to help them solve the addition clues that the criminal has left behind. Students will start with 9 suspects and then use their answers and the criminal's clues to help them figure out who the real criminal is! Students will have a BLAST trying to solve this crime-- they won't even know their learning and practicing!

How Should You Use Math Detectives?

This math activity is perfect in just about any way you choose. You can ...

  • Use these in centers for students to complete independently or with a group.
  • Use these as a whole group activity or small group activity and solve together.
  • Send the whole packet home for a holiday packet or for homework
  • Use it as an early finisher extension activity that students can pull out when they finish their assigned work.

Whatever way you choose, it's a guaranteed way to bring some fun and excitement to your classroom with minimal to no prep.

Check out the preview for more!

Want More Math Detectives?

Check out....

Area and Perimeter Math Detectives

Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Reviews

4.8
Rated 4.8 out of 5, based on 51 reviews
51
ratings
5
42
4
8
3
1
2
0
1
0
Mostly used with 3rd grade
Reviews
12
34
8
3
2
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2
2nd
3rd
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All verified TPT purchases
great resource!
Rated 5 out of 5
April 16, 2026
his 3 Digit Addition Math Detectives activity is such a fun and engaging way to practice addition skills! The mystery format keeps students hooked from start to finish, making them excited to solve each problem and uncover clues.
200 reviews • Rhode Island
Grades taught: 1st
Challenging, yet fun!
Rated 4 out of 5
September 8, 2025
Met expectations
Great value
Standards-aligned
I used this at the end of the year (2nd grade) as an addition review group challenge. It was a challenge to complete the tasks and solve the puzzles, but my students had a blast working together as a team! Took some prep work and organization, but with an assistant or parent volunteer, you could manage it a lot better than trying to check groups & assist alone!
287 reviews • Indiana
Grades taught: 2nd
Great resource for my HS life skills class to review concepts.
Rated 5 out of 5
July 28, 2025
Great resource for my HS life skills class to review concepts.
1,112 reviews • Texas
Grades taught: 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th
Student populations: Autism, Learning difficulties, Mild to severe disabilities
Rated 5 out of 5
July 16, 2025
This resource was easy to use and very engaging for my students.
Kimberly Clay
(TPT Seller)
3,763 reviews
Grades taught: 4th
Rated 5 out of 5
September 1, 2024
Great resource! I use it to challenge some of my second grade students.
Hanging with Miss H
(TPT Seller)
69 reviews
Grades taught: 2nd
Rated 5 out of 5
August 7, 2024
My students really enjoyed this math activity. It was a nice break from traditional worksheets. Thank you!
Toni B
(TPT Seller)
1,758 reviews
Grades taught: 3rd
Rated 5 out of 5
May 15, 2024
The kids loved using this resource in class. It was engaging and appropriate.
421 reviews
Grades taught: 3rd
Rated 5 out of 5
April 17, 2024
This was a fun way to get the students to practice their 3 digit addition.
amber B.
373 reviews
Grades taught: 2nd

Questions & Answers

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Standards

to see state-specific standards (only available in the US).
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
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