Printable Addition within 10 Worksheet | Grade 1 Math

This comprehensive worksheet is designed to help first-grade students master addition within 10. Through a variety of problem types, learners will practice horizontal and vertical addition, solve simple story problems, and tackle challenges involving missing addends. It provides essential, structured practice to build foundational arithmetic fluency and confidence in young mathematicians.

At a Glance

• Grade: 1 · Subject: Math
• Standard: CCSS.MATH.CONTENT.1.OA.C.6 — Add and subtract within 20, fluently for sums to 10.
• Skill Focus: Addition within 10, Missing Addends
• Format: 4 pages · 38 problems · Answer key included · PDF
• Best For: Independent practice, homework, fluency drills
• Time: 20–30 minutes

What's Inside

This four-page PDF contains 38 problems across four parts. It starts with horizontal and vertical addition, moves to story problems, and ends with a missing addend challenge. A full answer key is included for easy grading.

Skill Progression

The worksheet uses a gradual-release model.

• Guided practice: The first 28 problems are in a simple horizontal and vertical format to build initial confidence.
• Supported practice: Four story problems require students to apply addition in a contextualized format.
• Independent practice: The final "Challenge Zone" asks students to find the missing addend in six equations, promoting deeper understanding.

This structure ensures students are supported before tackling harder applications.

Standards Alignment

Directly aligned with CCSS.MATH.CONTENT.1.OA.C.6, requiring students to demonstrate fluency for addition within 10. It also supports CCSS.MATH.CONTENT.1.OA.D.8 (determining an unknown number). The standard codes can be copied directly into lesson plans or curriculum maps.

How to Use It

Use as independent practice after an addition lesson or as a homework assignment. For formative assessment, observe how students set up the story problems. This reveals their conceptual grasp. Expected completion time is 20-30 minutes.

Who It's For

Primarily for first-graders, this worksheet also works for second-grade review or for intervention. Students can use a number line or counters for support. It's an excellent follow-up to a lesson on addition properties.

This addition worksheet provides targeted practice aligned with CCSS.MATH.CONTENT.1.OA.C.6, a critical standard for early numeracy. By focusing on fluency with addition within 10, it builds the automaticity necessary for more complex mathematics. Research consistently shows that procedural fluency is a key component of mathematical proficiency. According to the RAND AIRS 2024 report on foundational math skills, early and repeated exposure to varied problem types—including abstract equations and story problems—is strongly correlated with long-term success in algebra and beyond. This resource offers 38 such problems, incorporating multiple formats from basic computation to finding a missing addend. This approach ensures students not only memorize facts but also understand the underlying part-whole relationships inherent in addition, preparing them for future learning in arithmetic and algebraic thinking.