These Adding 3 Addends Math Mystery Worksheets turn ordinary addition worksheets into an exciting problem-solving challenge! Students must add 2-digit numbers with regrouping, uncover clues, and solve fun classroom mysteries while strengthening core addition skills.

Perfect for 2nd, 3rd, and 4th grade math centers, independent practice, or sub-day review, this printable mystery helps students apply their math facts in a meaningful and motivating way.

What’s Included in the Addition Math Mystery:

• Printable Math Mystery Story
• Addition problems with 3 addends (2-digit numbers)
• Color in Picture for early finishers
• Answer key for easy grading
• Teacher instructions for setup and use

Why Teachers Love It

• Builds addition fluency and accuracy with 3-addend problems
• Adds fun and mystery to everyday math lessons
• Low-prep — print and go
• Ideal for early finishers, homework, or test prep
• Supports Common Core 2.NBT.B.6 and 3.NBT.A.2

Suggested Uses For Math Mysteries

• Math review weeks
• Partner or group problem-solving
• Sub plans or early finisher work
• Math centers or small-group rotations

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