Printable Two-Digit Addition Worksheet | Grade 1 Math

This worksheet provides targeted practice for first-grade students mastering two-digit addition without regrouping. Through a series of 24 carefully sequenced problems across four pages, learners will build confidence and fluency in adding tens and ones, moving from basic computation to applying their skills in word problems and challenges.

At a Glance

• Grade: 1 · Subject: Math
• Standard: CCSS.MATH.CONTENT.1.NBT.C.4 — Add within 100 based on place value and properties of operations.
• Skill Focus: Two-Digit Addition without Regrouping
• Format: 4 pages · 24 problems · Answer key included · PDF
• Best For: Independent practice, homework, math centers
• Time: 20–30 minutes

What's Inside

This four-page resource is structured to guide students through the concept of two-digit addition. It begins with basic column addition problems clearly labeled with "T" for tens and "O" for ones. The worksheet then progresses to word problems and a final challenge section. A complete four-page answer key is included for easy grading.

Skill Progression

The worksheet follows a gradual release model to support student learning.

• Guided practice: The first 16 problems solidify the core procedure of adding ones then tens.
• Supported practice: Four word problems provide real-world context for the skill, prompting students to translate scenarios into equations.
• Independent practice: The final challenge has students find missing addends, requiring them to think flexibly about the relationship between parts and a whole.

This I Do, We Do, You Do structure ensures students build a strong foundation before tackling more complex applications.

Standards Alignment

This worksheet is directly aligned with Common Core standard CCSS.MATH.CONTENT.1.NBT.C.4, which focuses on adding within 100 using place value. Students practice adding tens with tens and ones with ones, without regrouping. This foundational skill is a prerequisite for more advanced computation. Both standard codes can be copied directly into lesson plans, IEP goals, or district curriculum mapping tools.

How to Use It

Use this worksheet as independent practice after a direct instruction lesson on place value and two-digit addition. It's also an effective tool for a math center rotation or as a focused homework assignment. For formative assessment, observe which students, if any, attempt to add the tens column first; this provides an opportunity for a quick reteach on the importance of starting with the ones place. Most students will complete the worksheet in 20 to 30 minutes.

Who It's For

This resource is designed for first-grade students but can serve as a valuable review for second graders or as an intervention tool for students struggling with place value concepts. The clear, uncluttered layout is accessible for all learners. Pair this worksheet with a place value anchor chart or base-ten blocks to provide concrete support for students who need it.

Foundational skills in early numeracy, such as the two-digit addition without regrouping addressed in standard CCSS.MATH.CONTENT.1.NBT.C.4, are critical for future mathematical success. This worksheet provides structured practice in adding tens and ones, a key component of place value understanding. Research consistently shows that procedural fluency must be built upon a strong conceptual foundation. As noted in the RAND AIRS 2024 analysis of effective math instruction, practice materials that offer a clear progression from simple computation to application, like the 24 problems included here, help students build both skill and confidence. By mastering the ability to add within 100 based on place value, students are better prepared for multi-digit computation with regrouping and subsequent algebraic thinking. This resource supports that critical learning step by providing clear, focused, and standards-aligned practice.