Help students strengthen their basic math skills with this FREE Addition 1–20 Worksheet, designed for early learners and beginner-level practice. This printable page includes 20 horizontal addition problems with sums not exceeding 40, ideal for classrooms, homeschool use, or quick review sessions.

Key Features:

• Focuses on addition with numbers between 1–20
• Only horizontal problems for a simplified layout
• One printable worksheet page
• 20 math problems per page
• Answer key included for quick grading
• Clean, no-frills design for easy use
• Perfect for kindergarten to 2nd-grade students

Ways to Use This Worksheet:

• Independent seat work
• Math centers or stations
• Quick assessment or quiz
• Homework or take-home practice
• ‍ Substitute plans and early finisher tasks

Download, print, and start building addition confidence today—completely free!

By Page Count:

Addition Worksheets – Free

Addition Worksheets – 12 Pages

Addition Worksheets – 20 Pages

Addition Worksheets – 30 Pages

Addition Worksheets – 40 Pages

Addition Worksheets – 50 Pages

Addition Worksheets – 60 Pages

Addition Worksheets – 70 Pages

Addition Worksheets – 80 Pages

Addition Worksheets – 90 Pages

Related resources:

Addition Worksheets Vertical – 12 Pages

Addition Worksheets Vertical/Horizontal – 12 Pages

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Happy teaching!