Addition Practice Worksheets 0–20 | 40 Pages + Answers

Strengthen your students' addition skills with these 40 pages of horizontal addition worksheets focusing on numbers from 0 to 20. This resource is perfect for early learners in Kindergarten to Grade 2 and is designed to reinforce number sense, fluency, and accuracy in addition.

Each worksheet includes 16 horizontal addition problems, with sums not exceeding 40 — a great way to keep it simple and manageable for beginners.

Use these worksheets for:

• ✏️ Daily math warm-ups

• 🧠 Independent math centers

• 📝 Quick assessments or quizzes

• 🏠 Homework assignments

• 📚 Substitute teacher plans

🔑 Key Features:

• 40 printable pages of horizontal addition problems

• Problems include numbers 0–20, with answers under 40

• 16 practice problems per page

• Answer key included for easy grading

• No prep – just print and go!

• Ideal for Kindergarten, Grade 1, and early Grade 2

Help your students master addition with confidence using this low-prep, high-impact resource!