Adding multi-digit decimals with regrouping is an essential Grade 6 math skill, especially when numbers have different decimal places. This printable worksheet gives students focused practice using the standard addition algorithm, aligning decimal points, adding through the thousandths place, and carrying digits correctly between place-value columns.

Instead of practicing calculations alone, students also examine incorrect worked examples, explain why decimal alignment matters, and apply decimal addition to a measurement problem. These tasks help teachers see whether students can follow the procedure accurately and explain the mathematical reasoning behind it.

Build Accuracy with the Standard Addition Algorithm

The worksheet begins with short instructional notes that review the steps for adding decimals. Students learn why decimal points must line up, how trailing zeros can make place values easier to see, and when regrouping is necessary.

For example, rewriting 348.7 as 348.700 allows students to align tenths, hundredths, and thousandths before completing the calculation. This reinforces the relationship between equivalent decimal representations and accurate column addition.

What Students Practice

• Decimal addition exercises: Add multi-digit numbers using vertical place-value alignment and the standard algorithm.
• Regrouping practice: Carry values between columns when sums reach ten or more.
• Error analysis: Identify and correct mistakes in regrouping and decimal-point alignment using fictional students' worked solutions.
• Real-world application: Combine decimal measurements to calculate the total length of three ribbons.
• Mathematical explanations: Explain why adding trailing zeros preserves decimal values and makes column addition easier.
• Multiple-choice concept check: Recognize the correct method for arranging decimals before addition.

What's Included in This Resource?

• Printable Grade 6 decimal addition worksheet
• Lesson introduction with essential place-value and regrouping notes
• Multi-digit decimal calculation exercises
• Student error-analysis activities with correction tasks
• Real-world word problem and written reasoning questions
• Multiple-choice question checking decimal alignment
• Student Notes lines at the bottom of the worksheet

Use It at Different Stages of Your Lesson

During guided practice, teachers can review the introductory notes and demonstrate how to align decimal points before students begin independent calculations. The error-analysis activities provide opportunities for classroom discussion about common mistakes, including incorrect carrying and aligning numbers by their final digits.

For independent work or homework, students can apply the same addition method to increasingly demanding calculations and explain their reasoning. The written responses also provide useful evidence of whether students recognize the importance of place value rather than simply following a memorized procedure.

Curriculum Connection

This Grade 6 resource addresses Common Core standard 6.NS.B.3 through decimal addition using the standard algorithm. Its focus is adding multi-digit decimals accurately, with particular attention to regrouping and decimal-place alignment.

Choose this resource when your students need targeted practice that moves beyond obtaining an answer to identifying mistakes, checking procedures, and explaining how decimal addition works.