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100th Day of School Math Mystery Activity - 2nd Grade Math Worksheets

Rated 4.86 out of 5, based on 314 reviews
4.9 (314 ratings)
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Mrs J's Resource Creations
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1st - 3rd, Homeschool
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Mrs J's Resource Creations
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What educators are saying

I love these math mysteries. I've used them before and once the kids understand how they work, it is such easy prep and so engaging. This worked out great for me to put in my sub plans as I had to be out on the 100th day this year.
I love the math mysteries! And better yet, my students love them even more. It is a great way to review and keep the students engaged. I also have the students pair up and use it to teach working together.
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Description

100th Day of School Math Mystery Activity - 2nd Grade Math Worksheets Edition - The Case of the 100 Missing Treats. A fun way to practice and review math skills during the 100th Day of School. Easy prep! Just Print & Solve! Or go paperless with the new Google Slides option provided within your download.


A video hook is provided to set the stage to engage! Check out the video hook in the preview section.

A bonus ENDING VIDEO clip is included to celebrate finishing the mystery.

(Please note: The videos now come with voiceovers to read the story).


Students must use their math skills to unlock clues. Then, they must use their powers of deduction to narrow down the suspects to find who stole 100 treats from the school party hall!

Implementation Suggestion: Pace the clues one by one to keep the class at the same point. If using the clues in a different order, keep the suspect list away from students until all five clues are completed and discovered.

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Math Skills Required to Unlock Clues

There are five clues to crack to solve the mystery:

  • Clue 1: Adding Multiples of 10 and 100
  • Clue 2: Subtracting Multiples of 10 and 100
  • Clue 3: Input/Output Tables - Add 100
  • Clue 4: Input/Output Tables - Subtract 100
  • Clue 5: Adding Numbers up to 100

Students must use critical thinking skills to figure out what the clue is telling them to eliminate from the list of possibilities. Ensure students read and comprehend clues carefully!

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Multiple Uses

- Suitable for independent, pairs, or group work.

- Use as part of your math centers, add to your sub tubs, make it part of your early finisher tasks, give for homework, or make it part of your classroom practice/review sessions.

I recommend pacing this activity by giving students one clue at a time. Once the whole class has completed a clue, then move on to the next clue, either within the same lesson or the next math session. New math content presented? Make a lesson out of it by modeling the math before diving into the clue. I like to say, "We must learn something new before attempting the next clue."

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How long will this activity take?

Time to complete will vary anywhere between 30mins - 2 hours or more! It mainly depends on how familiar your students are with the math mystery format, as well as how difficult they find math skills covered in the particular mystery. Please check the math skills outlined in the clues above to help determine suitability for your class.

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This math mystery title is available in the different grade editions below. The story is the same, but the math involved to solve the case is different.

Currently available:

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

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You may also be interested in these other Resources:

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Bundle and Save!


COMPLETE Math Mystery Bundle for GRADE 2

HOLIDAY Math Mystery Bundle {GRADE 2}

SEASONS Math Mystery Bundle Pack (GRADE 2)

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Not sure what a math mystery is? CLICK HERE to watch a video about Math Mysteries

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


Browse the 2nd Grade Range:

>>Download the FREE 2nd Grade Math Mystery Checklist here<<

>> CLICK HERE to follow my store <<

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Thank you!

Mrs. J.

© 2020

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Standards

to see state-specific standards (only available in the US).
100 can be thought of as a bundle of ten tens - called a “hundred.”
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
Explain why addition and subtraction strategies work, using place value and the properties of operations.

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