This decimals math mystery review activity involves more challenging questions that focus on operations with both positive and negative decimals. This fun print and go mystery task will engage and motivate your class while getting lots of decimal practice in!

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.

(Update: Voice-overs added to the videos.)

Distance Learning Update: I've added a Word Document in the folder containing a Google Slides link to share this resource with your students via Google Classroom or Drive. Parts of the pages are editable so that your students can complete them without printing the pages. Please note you will need to make a copy of the Google Slides to your drive before you can edit.

-

Preparation

- No Prep required! Print the student pages, staple or place

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.

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

Math Skills Required to Unlock Clues

There are five clues to crack to solve the mystery:

• Clue 1: Find the Missing Decimal (In addition and subtraction equations involving both positive and negative decimals)
• Clue 2: Multiplying Decimals by Decimals
• Clue 3: Convert Mixed Numbers & Fractions to Decimals
• Clue 4: Dividing Decimals by Decimals
• Clue 5: Multiplying and Dividing with Positive/Negative Decimals

Students must use critical thinking skills to determine what the clue tells them to eliminate from the list of possibilities.

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

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."

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

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 formatand 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.

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

- Select a higher-grade version of this mystery if you want more challenging math skills.

- If you would like a set of easier math skills, select a lower-grade level version of this mystery.

This Decimals Math Mystery activity is also available for the other grade levels listed below:

Decimals Math Mystery: Case of the Disappearing Donuts (Grade 4)

Decimals Math Mystery: Case of the Disappearing Donuts (Grade 5)

Decimals Math Mystery: Case of the Disappearing Donuts (Grade 6)

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

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

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

You may also like these other 7th Grade Math Mysteries:

• Algebra Math Mystery: Case of the Alien Apocalypse
• Fractions Math Mystery: Case of the Forgetful Pharaoh
• Integers Math Mystery: Case of the Invisible Illusionist
• Halloween Math Mystery: Case of the Tricking Treat
• Thanksgiving Math Mystery: Case of the Gobbler's Curse
• Christmas Math Mystery: Case of the Zombie Elves
• New Year Math Mystery: Case of the Millennium Bug
• Back to School Math Mystery: Case of the Cursed Classrooms
• Percents Math Mystery: Case of the Pickpocketing Pirate
• Mean, Median, & Mode Math Mystery: Case of Mean Mountain

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)

>> CLICK HERE to follow my store <<

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

For more ideas, activities, and resources, follow my store (by clicking the little green star) to stay updated on new releases. We can also stay connected via:

Blog

Pinterest

Facebook

___________________________________________________________________

Thank you!

Mrs. J.

© 2019