1st Grade Valentine's Day Math Mystery Activity - Printable & Digital Worksheets

What others say

"My students are obsessed with all the different math mysteries. It's also a great tool to review previously learned standards."

Amanda P.

"These mysteries are so much fun and super engaging. They are also great for review. My class would be content doing these every single day. They are already asking for the St. Patrick's Day one. Thank you so much! "

Shannon Y.

Description

Valentine's Day Math Mystery: The Case Of The Valentine Villain - 1st Grade Edition. Engage and motivate your students while they use a variety of skills in these EASY PREP worksheets to help solve a crime!

Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.

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⭐Optional video hook included for introducing the case! (Check it out in the preview section)

⭐BONUS: Ending video added to wrap up the case!

---------------------------------------------------------------------------------------------

⭐Preparation⭐

- Print the student pages, staple or sort them in a folder, and your students are set to go.

- Have the video hook ready for viewing at the start of the lesson on an IWB, iPad, or computer monitor screen.

- Digital option: Make digital copies of the Google Slides before assigning to Google Classroom. Students will need to be in 'edit' mode to enter answers.

⭐Math Skills Required to Unlock Clues⭐

Students must use their math skills to unlock clues that will help them narrow down a list of suspects to find the Valentine Villain!

Clue 1 Worksheet: Adding three 1-Digit Numbers
Clue 2 Worksheet: Subtracting 1-Digit (1-5 only) from 2-Digit (Less than 50) Numbers (No Regrouping)
Clue 3 Worksheet: Greater than or Less than 50
Clue 4 Worksheet: Place Value - Value of the Underlined Digit (Tens & Ones)
Clue 5 Worksheet: Subtracting 10 from 2-Digit Numbers

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TRY A FULL FREE MATH MYSTERY HERE (GRADES 1 - 6 DIFFERENTIATED BUNDLE)

Browse the 1st Grade Range:

>>Download the FREE 1st Grade Math Mystery Checklist here<<

>> CLICK HERE to follow my store <<

Check out our entire range of Math Mysteries HERE

This Valentine's Villain Math Mystery is available in the following math grade packs:

You may also be interested in the following Valentine's Day Mysteries:

⭐Add extra motivation with this Detective Rank Chart Download the Mystery Record & Rank Chart FREEBIE HERE

❤️Bundle and Save!❤️

COMPLETE Math Mystery Bundle - 1st Grade

Holiday Math Mystery Bundle {GRADE 1}

SEASONS Math Mystery Bundle Pack (GRADE 1)

Thanks!

Mrs J.

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.

1st Grade Valentine's Day Math Mystery Activity - Printable & Digital Worksheets

Name: 1st Grade Valentine's Day Math Mystery Activity - Printable & Digital Worksheets
Brand: Mrs J's Resource Creations
SKU: 3000853
Price: 4.95 USD
Availability: InStock
Rating: 4.9 (251 reviews)

Mrs J's Resource Creations

41.6k Followers

$4.95

Highlights

Digital downloads

Google Apps

Grades

K - 2nd

Subjects

Basic Operations, Math

Standards

CCSS1.NBT.C.4

CCSS1.NBT.C.5

What others say

"My students are obsessed with all the different math mysteries. It's also a great tool to review previously learned standards."

Amanda P.

Shannon Y.

Save even more with bundles

1st Grade Math Mystery Holiday Bundle: Fun Math Review Activities

Math Mysteries for the HOLIDAYS collection. 1st Grade Edition. These fun math mystery activities will get your students excited about doing math! Save with this Math Mystery holiday bundle for 1st Grade! Engage and motivate your students to review a variety of math skills with this collection of fun

Price $82.22Original Price $117.45Save $35.23

COMPLETE 1st Grade Math Mystery Bundle - Fun Math Review Activities

Math Mysteries COMPLETE collection for 1st Grade. This complete math mystery bundle contains all of my math mysteries for Grade 1 up to date! Make math fun and exciting with these engaging activities that will motivate even some of your most reluctant learners.Easy prep! Just Print & Solve! Or g

Price $199.77Original Price $285.40Save $85.63

MEGA MRS. J's MATH MYSTERY BUNDLE (GRADES 1 - 6)

Mrs. J's Math Mystery collection from 1st to 6th grade.Grab all of the math mysteries to engage and motivate your students and differentiate across grade levels! FAQ: Will I be adding more math mysteries to this bundle?A: Yes, I will add new 1st-6th Grade Math Mysteries to this bundle until it reach

Price $1049.45Original Price $1750.70Save $701.25

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Complete Math Mystery Tri-Grade Bundle for 1st, 2nd, & 3rd Grade Math Mysteries

This Complete Math Mystery Tri-Grade Bundle contains all of my math mysteries currently in the range available for Grades 1, 2, and 3! Make math fun and exciting by adding a mystery twist to your worksheets. Your students will gain lots of math practice, while also developing their critical thinkin

Price $596.07Original Price $851.50Save $255.43

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Valentine's Day Math Mysteries - Differentiated GRADE Bundle Pack (1st - 7th)

This Valentine's Day Math Mystery Differentiated Bundle contains all of the printable and Google Slide worksheet grade versions for the Case of The Valentine Villain available (Grades 1-7). This bundle is great if you need to differentiate within your classroom because the clues are interchangeable

Price $14.00Original Price $28.00Save $14.00

Description

Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.

--------------------------------------------------------------------------------------------

⭐Optional video hook included for introducing the case! (Check it out in the preview section)

⭐BONUS: Ending video added to wrap up the case!

---------------------------------------------------------------------------------------------

⭐Preparation⭐

- Print the student pages, staple or sort them in a folder, and your students are set to go.

- Have the video hook ready for viewing at the start of the lesson on an IWB, iPad, or computer monitor screen.

- Digital option: Make digital copies of the Google Slides before assigning to Google Classroom. Students will need to be in 'edit' mode to enter answers.

⭐Math Skills Required to Unlock Clues⭐

Students must use their math skills to unlock clues that will help them narrow down a list of suspects to find the Valentine Villain!

Clue 1 Worksheet: Adding three 1-Digit Numbers
Clue 2 Worksheet: Subtracting 1-Digit (1-5 only) from 2-Digit (Less than 50) Numbers (No Regrouping)
Clue 3 Worksheet: Greater than or Less than 50
Clue 4 Worksheet: Place Value - Value of the Underlined Digit (Tens & Ones)
Clue 5 Worksheet: Subtracting 10 from 2-Digit Numbers

-----------------------------------------------------------------------------------------------------------------------

TRY A FULL FREE MATH MYSTERY HERE (GRADES 1 - 6 DIFFERENTIATED BUNDLE)

Browse the 1st Grade Range:

>>Download the FREE 1st Grade Math Mystery Checklist here<<

>> CLICK HERE to follow my store <<

Check out our entire range of Math Mysteries HERE

This Valentine's Villain Math Mystery is available in the following math grade packs:

You may also be interested in the following Valentine's Day Mysteries:

⭐Add extra motivation with this Detective Rank Chart Download the Mystery Record & Rank Chart FREEBIE HERE

❤️Bundle and Save!❤️

COMPLETE Math Mystery Bundle - 1st Grade

Holiday Math Mystery Bundle {GRADE 1}

SEASONS Math Mystery Bundle Pack (GRADE 1)

Thanks!

Mrs J.

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.

4.9

Rated 4.9 out of 5, based on 251 reviews

251
ratings

230

Mostly used with 1st grade

Reviews

126

PreK

1st

2nd

3rd

4th

5th

What customers are saying

Met expectations

100%

Is a great value

100%

Is standards-aligned

100%

All verified TPT purchases

Math Mystery

Rated 5 out of 5

May 15, 2026

My students are obsessed with all the different math mysteries. It's also a great tool to review previously learned standards.

Amanda P.

1,961 reviews • Oklahoma

Grades taught: 2nd

I loved this

Rated 5 out of 5

May 13, 2026

This was a great resource for my class! I was super impressed with the easy and the fun with this!

Brooke B.

142 reviews

Grades taught: PreK, K, 1st, 2nd

Great Resource

Rated 5 out of 5

April 29, 2026

Met expectations

Great value

Standards-aligned

This was a great activity during a crazy day at school. kids loved it

Stephanie D.

506 reviews • Ohio

Grades taught: 1st, 3rd

Student populations: Mild to severe disabilities

Engaging Math Activity

Rated 5 out of 5

April 22, 2026

Met expectations

Great value

Standards-aligned

Math mysteries are the best. The kids love them. They beg to work on them and are so engaged.

Dusty S.

586 reviews • Washington

Grades taught: 1st

Student populations: Autism, Emerging bilinguals, Learning difficulties

Fun resource!

Rated 5 out of 5

March 22, 2026

Met expectations

Great value

Standards-aligned

My students had so much fun doing this! This was a wonderful resource.

Jill N.

393 reviews • Utah

Grades taught: 1st

Student populations: Emerging bilinguals

SO FUN and ENGAGING!!

Rated 5 out of 5

March 17, 2026

My kids LOVED this activity. I am excited to use the other activities!

Andrea K.

616 reviews • Michigan

Grades taught: 1st, 2nd, 3rd

We love math mysteries!

Rated 5 out of 5

March 4, 2026

These mysteries are so much fun and super engaging. They are also great for review. My class would be content doing these every single day. They are already asking for the St. Patrick's Day one. Thank you so much!

Shannon Y.

1,513 reviews

Grades taught: PreK, K, 1st, 2nd

Fun Review of Skills

Rated 5 out of 5

March 2, 2026

Met expectations

Great value

Standards-aligned

I had an easter version and my prior students loved it, so I decided to try a Valentine's Day version. It did not disappoint. My students were completely engaged in solving the 'crime'. The made guesses and then updated them as their guess was eliminated. Great skill review, teamwork, and inferencing practice!

Andrea C.

372 reviews • North Carolina

Grades taught: 1st

Student populations: Autism, Emerging bilinguals, Learning difficulties

Questions & Answers

Standards

to see state-specific standards (only available in the US).

CCSS1.NBT.C.4

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

CCSS1.NBT.C.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.