Printable Missing Digit Addition Worksheet | Grade 4 Math

This Grade 4 worksheet provides essential, focused practice on multi-digit addition by challenging students to find the missing digits in four different problems. By working backward and applying their understanding of the standard algorithm, learners strengthen their grasp of place value, regrouping, and number relationships, building both procedural fluency and critical thinking skills.

At a Glance

• Grade: 4 · Subject: Math
• Standard: CCSS.MATH.CONTENT.4.NBT.B.4 — Add multi-digit numbers using the standard algorithm.
• Skill Focus: Multi-digit addition with missing digits
• Format: 1 page · 4 problems · Answer key included · PDF
• Best For: Independent practice or formative assessment
• Time: 10–15 minutes

What's Inside

This single-page PDF contains four addition puzzles in a grid format to keep numbers aligned. A complete answer key is included, making it easy for teachers to grade or for students to self-check their work.

A Step-by-Step Path to Fluency

The worksheet follows a gradual release model to build mastery.

• Guided Practice: The first problem uses smaller numbers (4- and 5-digits) as a clear entry point.
• Supported Practice: The next two problems increase complexity to 5- and 6-digit numbers, requiring more regrouping.
• Independent Practice: The final 7-digit problem demands full application of the standard algorithm to solve.

Standards Alignment

This resource is aligned with CCSS.MATH.CONTENT.4.NBT.B.4, which focuses on fluent multi-digit addition. The worksheet's puzzle format pushes students beyond simple calculation to a deeper understanding of how the algorithm works. It also supports skills needed for CCSS.MATH.CONTENT.5.NBT.B.7. Standard codes can be copied directly into lesson plans.

How to Use It

Use this versatile sheet for independent practice after a lesson, or as a formative assessment to check for understanding of regrouping. For a quick 10-minute warm-up or exit ticket, assign just the first two problems. The full worksheet takes about 10-15 minutes to complete.

Who It's For

Designed for Grade 4 students, this is also a great review for Grade 5 learners before they start decimal operations. For students needing support, pair this with a place value chart to help them visualize the regrouping process.

This worksheet directly supports the procedural fluency mandated by CCSS.MATH.CONTENT.4.NBT.B.4 by requiring students to apply, rather than merely repeat, the standard addition algorithm. The design reflects the principles of gradual release of responsibility, a framework where students move from teacher-led to independent work, as detailed by Fisher & Frey (2014). By asking students to solve for missing digits, the task reinforces the conceptual understanding of place value and regrouping—the critical "why" behind the algorithm. This approach moves beyond rote memorization, promoting number sense and logical deduction. Such targeted practice is essential for building the automaticity needed to free up cognitive resources for higher-order mathematical thinking and problem-solving. This exercise serves as a practical application of research showing that procedural fluency and conceptual understanding are intertwined and mutually reinforcing, ultimately leading to more durable mathematical skills.