Solving absolute value equations worksheets, Algebra 1 practice pages, and self-checking Mini Mystery Detective pack of math activities for 8th grade, 9th grade and 10th grade are all included in this printable detective pack. Students isolate the absolute value, split each equation into its two cases and find both values of x - working through equations with a coefficient outside the bars, a term to undo first, and a coefficient inside the bars where the solutions turn into fractions. Perfect for math centers and stations, guided math and small groups, warm ups and bell ringers, homework and independent practice, spiral review, test prep, intervention, tutoring, enrichment, early finishers, substitute plans and homeschool. Completely no prep - just print and go.
Every case is set in one grand old hotel: a leaking top floor, a stopped hall clock, a spoiled banquet, a drained roof pool. Because every equation here has two solutions, a student who drops the negative case cannot finish the mystery - the pages check themselves, so students go back and find their own mistake before it ever reaches your marking pile.
What's Inside
- Splitting an absolute value equation into its two cases: |x - 26| = 36
- Dividing by a coefficient before the split: 7|x - 18| = 105
- Undoing a term outside the bars first: |x - 25| - 16 = -8
- Two moves before the split: 3|x + 8| + 12 = 45
- A coefficient inside the bars, where the solutions become fractions: |4x - 5| = 29
- A coefficient inside and a term outside together: |5x - 15| - 12 = -4
- Writing both solutions, positive and negative, in simplest form
- A reference page on when an absolute value equation has two solutions, one solution, or no solution at all
Ten leveled cases run through the Grand Meridian hotel: The Leaking Top Floor, The Silent Room Phone, The Missing Roof Key, The Stopped Hall Clock, The Cold Dining Room, The Torn Floor Map, The Spoiled Banquet, The Switched Bag Tags, The Drained Roof Pool and The Blank Lobby Screen.
Answer keys, a detective's case log and a certificate of achievement are included.
What is a Mini Mystery Detective?
A no-prep detective activity where students solve math problems to cross off suspects and unmask the culprit. Skill practice plus critical thinking in one engaging, self-checking worksheet set - like an escape room without the locks.
When to Use This Resource
- Algebra 1 math centers, stations and rotations
- Guided math and small group work
- Warm ups, bell ringers and morning work
- Homework and independent practice
- Spiral review before a unit test
- Test prep and end-of-unit review
- Intervention, tutoring and enrichment
- Early finishers and indoor recess
- Substitute plans and emergency cover
- Homeschool lessons
- Partner work and whole-class challenge
Grade Levels
Designed for 8th, 9th and 10th grade Algebra 1 students. Also beneficial for advanced 7th graders meeting absolute value equations for the first time, and for 11th and 12th graders who want a refresher before an Algebra 2 unit.
Why Teachers Love Mystery Detectives
- Zero prep - print and go
- Self-checking, so students catch their own mistakes
- Leveled, so you can hand different pages to different students
- Prints clean in black and white
- A detective hook that keeps a whole class working
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