6th Grade Math · Multi-Digit Decimal Fluency
Adding decimals Worksheets
Fresh practice, ready to print. Answer key included.
Larger decimals, including thousandths, such as 348.2 + 19.075.
Make it yours
Or start with a ready-made version.
How it works: a quick refresher
The rules this worksheet practices, then one problem worked from start to finish.
| Strategy | How it works |
|---|---|
| Line up the points | To add or subtract, write the numbers so the decimal points are in one column, then work from the right. |
| Fill empty places | 6.2 − 1.085 needs the empty places filled: write 6.200 − 1.085. |
| Count the decimal places | To multiply by a whole number, multiply, then give the product as many decimal places as the decimal factor. 2.45 × 16 has two. |
| Make the divisor whole | 14 ÷ 0.35: move both points two places right to get 1,400 ÷ 35. |
| Estimate the size | 14 ÷ 0.35 is a bit less than 14 ÷ 0.3, which is about 47, so an answer near 40 is reasonable. |
Worked example
Find 14 ÷ 0.35.
- 10.35 has two decimal places, so move both decimal points two places to the right.
- 20.35 becomes 35. Write 14 as 14.00, which becomes 1,400.
- 3Divide 1,400 by 35. 35 × 40 = 1,400.
- 4The quotient is 40. Check by multiplying: 0.35 × 40 = 14.
Ready-made versions
Three fixed versions you can link to or share. Each is a PDF with its own answer key.
- Adding decimals Worksheets, version 1Worksheet PDFAnswer key PDF
- Adding decimals Worksheets, version 2Worksheet PDFAnswer key PDF
- Adding decimals Worksheets, version 3Worksheet PDFAnswer key PDF
Grade level and standard
Written for 6th grade math (number system) and aligned to CCSS 6.NS.B.3. It also works as review in later grades.
Common questions
- Is there an answer key?
- Yes. Every worksheet has a matching answer key with each answer worked on the same grid or layout as the question. The worksheet code printed at the bottom of each page pairs a sheet with its key.
- Why do some subtraction problems show thousandths on only one number?
- The other number has empty places there. 6.2 − 1.085 needs those places filled with zeros, so write 6.200 before subtracting. That is the step students most often skip.
- How many decimal places does a product have when you multiply by a whole number?
- The same number as the decimal factor. A whole number adds none. 2.45 × 16 has two decimal places: 245 × 16 = 3,920, so the product is 39.20, which is 39.2.
- How many different versions are there?
- About a million per skill. Each time you press the button the problems are generated fresh, so you can print a different version for every student, a retake, or another night of practice.
- Are the worksheets free?
- Yes. They are free to print and copy for your home or classroom, with no sign-up.
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