Free printable worksheet
Adding and Subtracting Decimals Worksheet
Twenty decimal addition and subtraction problems emphasizing aligned place values, placeholder zeros, and accurate regrouping.
Middle School MathGrades 5-73 pagesAnswer key included
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What this worksheet includes
- Twenty decimal addition and subtraction problems emphasizing aligned place values, placeholder zeros, and accurate regrouping.
- 3-page printable PDF with a complete answer key
- Designed for Grades 5-7 middle school math practice
- Available as an immediate free download with no email required
How to use it
Use this adding and subtracting decimals worksheet for guided practice, independent review, homework, tutoring sessions, or a quick skills check. The spacious layout is designed to leave room for students to show their work rather than guess from crowded answer choices.
After students finish, compare their reasoning with the included answer key. When an answer is incorrect, have the student locate the first step where their work changed direction before trying the problem again.
Who this practice is for
This resource is designed for grades 5-7 students working on middle school math. Teachers, tutors, homeschool families, and parents can preview the first page before deciding whether the level and spacing fit the student.
Looking for a broader sequence? Browse all Middle School Math worksheets.
Topic guide
How to approach adding and subtracting decimals
Decimal addition and subtraction follow the same place-value rules as whole-number operations. Aligning decimal points ensures that ones combine with ones, tenths with tenths, and each smaller place stays in its correct column.
Placeholder zeros can make missing places visible without changing a number's value. Estimating before calculating provides a quick check against misplaced decimal points or regrouping errors.
Learning objectives
- Align decimal place values
- Add and subtract multi-digit decimals
- Use estimation to check decimal results
Skills to review first
- Decimal place value
- Whole-number addition and subtraction
- Regrouping across zeros
Worked example
Follow the reasoning step by step
Add 12.08 and 3.9.
- Estimate 12 + 4 to expect a result near 16.
- Write 3.9 as 3.90 so the places are visible.
- Align the decimal points and add each column.
- Bring the decimal point straight down into the sum.
Solution: 15.98.
Try before downloading
Three sample problems
Work each problem, then open the answer to check your result.
Show answer
Show answer
Error check
Common mistakes to watch for
- Aligning the final digits instead of decimal points
- Treating a missing decimal place as if it did not exist
- Dropping the decimal point from the answer