4th Grade Math Review CSI Mystery Worksheets
Grades 4–5 · The Missing School Pet
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Inside the case file
4th grade math review worksheets covering long division, 4 digit addition and subtraction, multi digit multiplication and rounding are all included in this CSI Mystery Detective grade 4 review activity. It is a whole-year math review in a single detective case, perfect for end of year review, back to school spiral review, test prep, math centers, early finishers, homework and sub plans. Completely no prep - just print and go.
What's Inside
Every page reviews a different fourth grade number and operations skill, so one case covers the year:
- Long division with three-digit dividends and one-digit divisors, every quotient exact: 392 divided by 4, 460 divided by 5, 480 divided by 5
- Adding and subtracting four-digit and three-digit numbers with the standard algorithm, regrouping on every question: 1,195 + 899, 8,294 - 321, 6,689 - 817
- Multiplying a two-digit number by a one-digit number and a two-digit number by a two-digit number: 59 x 7, 68 x 5, 73 x 45, 58 x 44
- Rounding multi-digit whole numbers to any place - the nearest ten, hundred, thousand and ten thousand: 58,316, 6,812, 42,844, 82,969
- Multiplying two-digit numbers by multiples of ten to trace a route through the evidence maze: 13 x 50, 22 x 30, 89 x 10
- Reading a suspect chart and using evidence to eliminate suspects one clue at a time
One case to crack - The Missing School Pet - across five pieces of evidence: a coded message, a true-or-false tally chart, a matching page, a round-and-shade page and an evidence maze. Full color and black-and-white versions of every page, and answer keys included.
What is a CSI Mystery Detective?
"It's a print-and-solve math activity - like an escape room without the locks." Students work through math problems to collect evidence, eliminate suspects, and reveal who did it. It combines real skill practice with critical thinking and a detective hook that keeps the whole class engaged.
Every page is self-checking. A wrong answer garbles the coded message or runs the maze into a dead end, so students catch their own mistakes before you do.
When to Use This Resource
- End of year math review
- Back to school review and diagnostic warm-ups
- Test prep and spiral review
- Math centers and small groups
- Early finishers
- Sub days and emergency plans
- Homework and morning work
Grade Levels
Designed for 4th grade. Also beneficial for struggling 5th grade students who need a confidence-building review of multi-digit computation, and for advanced 3rd grade students ready to move beyond three-digit numbers.
Why Teachers Love CSI Mystery Detective packs
- Zero prep - print and hand out
- Self-checking, so students spot their own errors
- Real computation practice, not a worksheet dressed up
- A detective hook that holds even reluctant mathematicians
- Full color and black-and-white versions for easy printing
- Covers a whole year of number and operations in one activity
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