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Halloween 4-digit addition and subtraction worksheets 3rd 4th grade
Mystery Detective

4-Digit Addition & Subtraction

Mystery Detective Worksheets · Grades 2–5 · Halloween

2nd grade math3rd Grade Math4th Grade4th Grade Math5th Grade MathGrade 2Grade 3Grade 4Grade 5Answer keys included

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Inside the case file

Halloween 4 digit addition and subtraction worksheets for 3rd grade and 4th grade, in five CSI Mini Mystery Detective cases with math for October centers or homework. Every problem needs regrouping. They're no prep, with black and white copies and answer keys.

 

In these stories a witch turns the teacher into a frog and a friend into a turtle, and students have to find out who won the costume competition. Each answer matches a clue to cross off. Addition and subtraction are mixed on the page.

 

The Cases

  1. Friendly Frog - the teacher has become a frog
  2. Trick or Treat Teacher - a student surprised the teacher
  3. Turtle Trouble - a friend turned into a turtle
  4. Under The Costume - who is behind the mask
  5. Costume Competition - the winner of the contest

 

What's Inside

  • Five Halloween cases of 4 digit addition and subtraction
  • Regrouping in every problem
  • Black and white copies
  • Answer keys for every case
  • Teacher instructions

 

What Is a CSI Mini Mystery Detective?

It's a single page per case. The problems are on the left, the clue lists on the right, and each clue has a number. Students cross off what matches, and one clue is left in each list.

 

When to Use This Resource

These fit the weeks around Halloween. 4th graders can use them as review of both operations, and 3rd graders once 4 digit work has started. Use them for morning work, early finishers, sub days or homeschool.

 

Grade Levels

Written for 3rd grade and 4th grade, as October practice.

 

Why Teachers Love These Cases

  • A Halloween theme
  • Both operations in one pack
  • No prep
  • Students check their own answers

 

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