Missing Addend to 20 Math Worksheets | Addition Fluency Practice

Help your students build addition fluency within 20 with these engaging Missing Addend Worksheets! This no-prep, print-and-go resource gives students focused practice finding the unknown number in addition equations.

Perfect for Grade 1 and Grade 2, these worksheets are a simple and effective way to strengthen number sense, addition strategies, and understanding of fact relationships.

What’s Included

• 5 printable worksheets
• 20 questions per worksheet
• 100 total practice problems
• Answer keys included
• No-prep, print-and-go format

Skills Covered

• Addition within 20
• Finding the missing/unknown addend
• Addition fact fluency
• Number sense
• Understanding addition relationships and fact families

Ways to Use This Resource

These worksheets are versatile enough for:

• Math centers
• Independent practice
• Morning work
• Homework
• Assessment
• Test preparation
• Extra math practice
• Small-group instruction

Missing addend problems help students understand the relationship between numbers and develop a stronger foundation in addition. Regular practice can build confidence while reinforcing essential addition skills within 20.

Download today and give your students simple, focused addition practice they can complete independently!