1st Grade Math Mystery Worksheets
1st Grade Math Mystery Worksheets
Welcome to our 1st Grade Math Mysteries!
First graders focus on solving problems with missing numbers in a sequence, recognizing even and odd numbers, and understanding basic addition and subtraction. These math mystery activities challenge students to identify missing numbers, distinguish between even and odd, and strengthen their fact fluency. By integrating math puzzles with fun themes, students remain engaged while developing critical thinking and math skills.
Common Core Standard: 1.OA.A.6 (Add and subtract within 20, demonstrating fluency for addition and subtraction within 10).
Math Mysteries by Month and Week (Printable PDFs)
In this section you will find all of our math mysteries organized by the month and week. Each PDF contains multiple pages of case files, math activities to solve clues, and answer keys.
January Week 1 - The Case of the Lost Ice Skates
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January Week 2 - The Case of the Stolen New Year's Party Hat
January Week 3 - The Mystery of the Missing Snowballs
January Week 4 - The Case of the Broken Sled
October Week 1 - The Case of the Vanishing Vampire Bats
October Week 2 - The Mystery of the Witch's Cauldron
October Week 3 - The Mystery of the Haunted Pumpkin Patch
October Week 4 - The Case of the Missing Halloween Candy
November Week 1 - The Case of the Missing Turkey Feathers
November Week 2 - The Case of the Disappearing Scarecrow
November Week 3 - The Case of the Lost Scarf
November Week 4 - The Fall Festival Mystery
December Week 1 - The Case of the Missing Christmas Star
December Week 2 - The Case of the Stolen Candy Canes
December Week 3 - The Mystery of the Snowman's Hat
December Week 4 - The Case of the Missing Penguins