Missing Numbers to 20, Unknown Addends, Minuends and Subtrahends - Addition & Subtraction Math Worksheets Grade 1 - 2

Help your students build number sense and math fact fluency with these no-prep Missing Numbers to 20 worksheets!

Designed for Grade 1 and Grade 2, this resource gives students focused practice with missing addends, minuends, and subtrahends while also reinforcing addition and subtraction within 20.

Each worksheet includes a variety of problems that encourage students to think about the relationship between numbers and identify the missing part of an equation. About 2 questions per worskheet also provide practice finding the unknown sum or difference, while the main focus remains on missing addends, minuends, and subtrahends.

What's Included

• 5 no-prep worksheets
• 20 questions per worksheet
• Answer keys included

Skills Covered

• Missing addends
• Missing minuends
• Missing subtrahends
• Addition within 20
• Subtraction within 20
• Finding unknown sums and differences
• Number sense and math fact fluency

Perfect For

Use these worksheets for:

• Independent practice
• Homework
• Morning work
• Math centers
• Assessment
• Review
• Test preparation
• Early finisher activities

Simply download, print, and use - no prep needed!

Give your students meaningful practice with addition and subtraction within 20 while strengthening their number sense and math fact fluency.