First Grade Addition Within 20 – No-Prep Math Worksheets & Activities

Build addition fluency, strengthen number sense, and develop essential math skills with this comprehensive First Grade Addition Worksheets and Activities resource! Designed for first-grade students, this printable resource provides engaging practice with addition within 10 and addition within 20 using a variety of visual models, strategies, and problem-solving activities.

With 44 pages of student activities, this no-prep math resource is perfect for classroom instruction, independent practice, math centers, morning work, homework, intervention, and year-round review.

Students progress from visual representations to more advanced addition strategies, building confidence as they practice adding numbers, finding missing addends, completing number bonds, and solving addition word problems.

✅ What's Included?

⭐ Part 1: Addition Within 10

Help students develop foundational addition skills with activities covering:

• Addition with Pictures

• Addition with Fingers

• Addition with Dominoes

• Ten Frame Addition

• Number Line Addition

• Missing Addends Within 10

• Number Bonds Within 10

• Missing Numbers in Ten Frames

• Vertical Addition Within 10

• Making 10

• Adding Three Numbers

• Addition Word Problems Within 10

• And More!

⭐ Part 2: Addition Within 20

Extend students' addition skills with activities covering:

• Addition with Pictures

• Addition with Fingers

• Addition with Dominoes

• Ten Frame Addition Within 20

• Missing Addends Within 20

• Number Bonds Within 20

• Missing Numbers in Ten Frames

• Vertical Addition Within 20

• Making 20

• Adding Three Numbers

• Addition Word Problems Within 20

• And More!

⭐ Math Skills Covered

• Addition within 10 and within 20

• Ten frame addition strategies

• Number bonds and missing addends

• Number line addition

• Making 10 and making 20

• Counting on and number sense

• Vertical addition

• Addition word problems

• Adding three numbers

• Visual models and addition strategies

✅ Why Teachers Will Love This Resource

No-Prep Convenience: Simply print and use for quick, easy math practice with minimal preparation.

Comprehensive Skill Practice: Includes 44 pages of student activities covering a wide range of first-grade addition skills.

Step-by-Step Progression: Begins with addition within 10 before progressing to addition within 20.

Multiple Visual Models: Gives students opportunities to practice with pictures, fingers, ten frames, dominoes, number lines, and number bonds.

Flexible Classroom Use: Ideal for whole-group instruction, small groups, math centers, independent work, homework, and review.

Easy Differentiation: Use the addition-within-10 activities to reinforce foundational skills and the addition-within-20 activities for further practice and skill development.

✅ Perfect For

• First Grade Math

• Addition Within 10 and Within 20

• Back-to-School Math Review

• Daily Math Practice and Morning Work

• Math Centers and Small Groups

• Independent Practice and Early Finishers

• Homework and Homeschool

• Math Intervention and Remediation

• Substitute Teacher Plans

• Fall, Winter, Spring, and Year-Round Math Activities

Use Throughout the School Year

Whether students are learning basic addition facts, strengthening counting strategies, or working toward addition within 20, this resource provides flexible practice to support their progress. The two-part format makes it easy to review prerequisite skills, reinforce classroom instruction, and provide additional practice when needed.

Just print and teach!

Terms of Use

This digital resource is intended for personal and single-classroom educational use.

• Classroom Use: Print and use the resource with your own students in one classroom.

• Personal Printing: Unlimited printing is permitted for your own use and for students in your classroom.

• Copyright: Do not resell, redistribute, share the digital files, or upload them to public websites or other platforms for others to access.

• Digital Product: This is a digital download. No physical product will be shipped. All sales are final, except where applicable law or platform policies require otherwise.