Make 2-digit addition and subtraction without regrouping engaging with these Mystery Number Math Riddles. Students practice addition and subtraction within 100 without regrouping by solving equations and analyzing math riddles to determine the mystery number. They use critical thinking skills, such as even and odd numbers and greater than and less than comparisons, to eliminate incorrect answers until only the correct mystery number remains.

This resource is perfect for students who are just beginning to learn 2-digit addition and subtraction without regrouping and need practice without regrouping. It pairs perfectly with the 2-digit Addition and Subtraction Word Problems No Regrouping for extra engagement and critical thinking.

What’s Included:

• 10 Mystery Number Riddle worksheets
  • 3 addition without regrouping worksheets
    
  • 3 subtraction without regrouping worksheets
    
  • 4 mixed addition and subtraction without regrouping worksheets
    
• Student friendly riddle format
  
• Complete answer keys
  

How It Works:

1. Students solve the math equations.
   
2. Students read each clue carefully.
   
3. Incorrect answers are eliminated using logic and math reasoning.
   
4. The remaining answer reveals the mystery number.
   

Ways to Use:

• Math centers or stations
  
• Partner or small group activities
  
• Independent practice
  
• Early finisher work
  
• Spiral review or intervention
  
• Sub plans or test prep

• Homework practice

• Morning work or Bell Ringers
  

Supports Common Core Standards (CCSS) and TEKS:

• Common Core Standards: 2.NBT.A.4, 2.NBT.B.6, 2.OA.C.3

• TEKS: 2.2D, 2.4B, 2.7A

Skills Included:

• Addition and subtraction within 100 without regrouping
  
• Solving for the unknown (mystery number)
  
• Even and odd numbers
  
• Greater than and less than comparisons
  
• Critical thinking and reasoning

Love This Resource:

Save time and money and get the 2-Digit Word Problems & Riddles Mini Bundle. Daily math routines and follow-up practice are all taken care of!

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Copyright © Paige O’Kelley

Permission to copy for single classroom use only.

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