Help your students build strong number sense with these Missing Number Addition & Subtraction Worksheets!

Designed for Grades 1–3, this no-prep resource gives students meaningful practice finding unknown numbers in equations within 20.

The worksheets are leveled Easy, Medium, and Hard, making them perfect for differentiation, math centers, and skill review.

📘 What’s Included

• 10 printable worksheets (PDF)
  • Easy (5 pages): Visual support with simple addition & subtraction
    
  • Medium (3 pages): Missing numbers with subtraction and crossing out
    
  • Hard (2 pages): More challenging missing number problems (e.g. ☐ − 12 = 5)

Levels included: Easy (ideal for Grade 1), Medium (Grade 1–2), Hard (Grade 2–3 review)

• Student-friendly “draw, count, and cross out” format
  
• Black & white, ink-friendly
  
• Answer key included
  

🎯 Skills Covered

• Finding missing numbers in equations
  
• Addition & subtraction within 20
  
• With and without regrouping
  
• Number sense & algebraic thinking
  
• Problem-solving strategies
  

👩‍🏫 Perfect For

• Grade 1–3 math centers
  
• Independent practice
  
• Small group instruction
  
• Intervention & review
  
• Homework or early finishers