Worksheets · Pre-Algebra

Adding and subtracting decimals worksheet

Line up the decimal points, write zeros so both numbers have the same number of places, and add or subtract as with whole numbers. The point in the answer sits directly under the others.

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Pick more than one for a sheet that mixes them.

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Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

Adding and Subtracting Decimals

Date Period

Add or subtract.

  1. 1.52−40.96
  2. 72+42.16
  3. You buy items costing $9.11, $9.78, $2.78 and pay with $30.00. How much change do you get?
  4. 20.06−16.76
  5. 4.3+42.311
  6. A receipt lists $15.98, $4.11, $13.17. What is the total?
  7. 8.72+19.77
  8. 40.907−15.2
  9. You buy items costing $3.05, $14.53, $11.53 and pay with $30.00. How much change do you get?
  10. 25.86+10.98
  11. 29.935+67.1
  12. A receipt lists $18.47, $13.86, $18.38. What is the total?
  13. 5.03+35.29
  14. 93−69.74
  15. A receipt lists $13.54, $18.98, $2.64. What is the total?
  16. 16.11+17.32
  17. 53+7.54
  18. You buy items costing $17.09, $5.46, $3.29 and pay with $40.00. How much change do you get?
  19. 6.65−22.32
  20. 6.7+29.782

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

Sigma Prep · sigmaprep.io/worksheets

Name

Adding and Subtracting DecimalsAnswer keyVersion 1

Date Period

Add or subtract.

  1. 1.52−40.96−39.44
  2. 72+42.16114.16
  3. You buy items costing $9.11, $9.78, $2.78 and pay with $30.00. How much change do you get?$8.33
  4. 20.06−16.763.3
  5. 4.3+42.31146.611
  6. A receipt lists $15.98, $4.11, $13.17. What is the total?$33.26
  7. 8.72+19.7728.49
  8. 40.907−15.225.707
  9. You buy items costing $3.05, $14.53, $11.53 and pay with $30.00. How much change do you get?$0.89
  10. 25.86+10.9836.84
  11. 29.935+67.197.035
  12. A receipt lists $18.47, $13.86, $18.38. What is the total?$50.71
  13. 5.03+35.2940.32
  14. 93−69.7423.26
  15. A receipt lists $13.54, $18.98, $2.64. What is the total?$35.16
  16. 16.11+17.3233.43
  17. 53+7.5460.54
  18. You buy items costing $17.09, $5.46, $3.29 and pay with $40.00. How much change do you get?$14.16
  19. 6.65−22.32−15.67
  20. 6.7+29.78236.482

Free math worksheets at sigmaprep.io/worksheets© 2026 Sigma Prep

How to do these

12.5+3.476

  1. Write 12.5 as 12.500.
  2. Line up the points and add.
  3. 12.500 plus 3.476 is 15.976.

The answer is 15.976.

Where students go wrong

Lining up the last digits instead of the decimal points, which adds tenths to thousandths.

Also called adding decimals, subtracting decimals or adding and subtracting decimals word problems.

What you can put on this worksheet

Adding and subtracting
6.7+1.4 → 8.1
Different numbers of decimal places
14.7−12 → 2.7
Totals and change: word problems
A receipt lists $4.81, $5.04. What is the total? → $9.85
Adding and subtracting negative decimals
(−14.7)−(−11.3) → −3.4

Questions about these worksheets

Yes. Every adding and subtracting decimals sheet is free to print and free to download as a PDF. There is no account to make, no email to hand over and no limit on how many you take.

Yes. The answer key prints on a second page, and you can choose whether it shows each question beside its answer or just the answers in a list.

Yes. Print straight from the page, or download the PDF and print that. The sheet is laid out for paper rather than squeezed off a screen, so there is room to work under each question, and the answer key comes out on its own page.

Pre-Algebra is usually taken around 7th or 8th grade, though schools vary and plenty of students meet it earlier or later. Pick the difficulty rather than the grade: the easy level suits a first lesson on it, the hard level suits review before a test.

Yes, as many as you like. The questions are built fresh each time rather than picked from a fixed set of files, so pressing Generate gives a new sheet. That is what you want for a second class, a retake, or two students sitting next to each other.

That is the closest comparison, and Kuta Software is good software. It is also paid software you install on a computer. These worksheets run in a browser tab for free, with no account and nothing to install. Like Kuta, the adding and subtracting decimals questions are generated when you ask for them rather than pulled from a fixed set of files, so two classes never get the same sheet, and the answer key comes with it.

Yes. There are three levels, and you can tick more than one for a sheet that mixes them, in which case the questions come out easiest first. The harder levels are not just larger numbers: they ask for something the easy ones do not.

You pick from 4: adding and subtracting, different numbers of decimal places, totals and change: word problems and adding and subtracting negative decimals. Tick as many as you want and set how many of each, or let it spread them evenly.

Lining up the last digits instead of the decimal points, which adds tenths to thousandths.