Give your students fun winter math practice with these secret code puzzles! Kids solve addition and subtraction equations to reveal hidden codes, making math engaging and hands-on.

This resource provides winter-themed worksheets where students practice fact fluency by creating and solving equations using a secret code key. With activities for both addition and subtraction, these pages are perfect for keeping students motivated while strengthening their number sense.

What’s Included

• Addition Crack the Code worksheets
  
• Subtraction Crack the Code worksheets
  
• Mixed addition and subtraction puzzles
  
• Missing addend and subtrahend activities
  
• Answer keys for all worksheets
  

Perfect For

• Independent practice
  
• Math centers
  
• Morning work
  
• Homework
  
• Early finishers
  
• Sub plans
  

📘 TEKS & Common Core Alignment
Students will practice solving addition and subtraction equations within 20, identify missing addends, and strengthen fluency through engaging math puzzles.

• TEKS:
  
• 1.3(B): Use objects and pictorial models to solve word problems involving joining, separating, and comparing sets within 20.
  
• 1.5(D): Represent word problems involving addition and subtraction of whole numbers up to 20 using objects, pictures, and equations with unknowns in all positions.
  

• CCSS:
  
• 1.OA.C.6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
  
• 1.OA.D.8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.