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$Halloween place value worksheets and rounding practice for 3rd and 4th grade math, ten no prep printable detective cases set at a Halloween festival$

Mystery Detective

Halloween Place Value and Rounding

Name: Halloween Place Value and Rounding | Mystery Detective Worksheets | Grades 3–5
Brand: Kiwiland Education
SKU: 17849085
Price: 4.5 USD
Availability: InStock

Mystery Detective Worksheets · Grades 3–5

Grade 3Grade 4Grade 5Answer keys included

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Self-checkingEvery right answer clears a suspect. A wrong answer matches nobody.

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Sub-day readyClear instructions and full answer keys.

Inside the case file

Halloween place value worksheets for 3rd grade and 4th grade, with rounding, expanded form and the value of a digit all in one no prep CSI Mini Mystery Detective math pack. The ten printable cases have a pumpkin festival theme. Put these Halloween math activities in your October math centers, or use them for morning work, homework and early finishers. Answer keys are included.

Use this pack in October, toward the end of your place value unit. Students round to the nearest 10 up to the nearest 100,000, find the value of an underlined digit, and turn expanded form into standard form. They match each answer to a suspect's badge and cross the name off, and the pages are self-checking. The grade 3 cases come first, and the grade 4 cases build from there.

What's Inside

Ten one-page detective cases on place value and rounding, each with an answer key
Four 3rd grade cases: rounding to the nearest 10 and 100, the value of a digit, and expanded form
Six 4th grade cases with 5- and 6-digit numbers, finishing with a mixed review case
A reference page with a worked example for every skill
A contents page, teacher instructions, a detective case log and a certificate of achievement
30 black and white pages, ready to print

The Cases

The Giant Pumpkin Swap - round pumpkin weights to the nearest 10
The Cauldron Candy Raid - round candy counts to the nearest 100
The Haunted Hayride - value of the underlined digit
The Costume Parade Mix-Up - expanded form to standard form
The Bat Cave Blackout - digit values in 6-digit numbers
The Tangled Web - expanded form with the parts mixed up
The Snuffed-Out Candles - find the missing expanded form part
The Broomstick Race - round to the nearest thousand
The Fallen Moon - round to 10,000 and 100,000
The Lost Halloween - every place value skill, mixed

When to Use This Resource

The cases start with rounding to the nearest ten and hundred, then the value of each digit, expanded form, and the same ideas with bigger numbers. A 3rd grade class can work through the first four cases and stop there, while a 4th grade class can use them as a warm-up before the larger numbers. The final mixed case is a good end of unit check, and you can hand out one case a day across Halloween week. Guided math groups, bell ringers, test prep, sub days, homeschool and fall review are other good fits.

Grade Levels

Cases 1-4 are written for 3rd grade, with numbers up to 9,999. Cases 5-10 are written for 4th grade, with 5- and 6-digit numbers, so the whole pack also works as a 4th grade beginning of the year review or extension work for a strong 3rd grade class.

Why Teachers Love Mystery Detectives

No prep at all
Self-checking pages
Rounding, value of a digit and expanded form together in one place value pack
A Halloween festival story that is fun and never scary
Prints clearly in black and white

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