These adding decimals worksheets are generated rather than scanned, which means you can print a different sheet every day of the week without paying for a subscription or running out of practice. Two of the problems on the sheet as it stands are 4.00 + 48.33 and 18.18 + 49.23 — answers 52.33 and 67.41 — and a new set is one click away.
‘New set of problems’ opens the generator in its own tab. There you can change the problem count and turn the answer key on or off. ‘Print or save as PDF’ opens the print dialog — choose Save as PDF in the printer list to keep the file. The sheet fits US Letter and A4, and the answer key prints on its own page.
Writing in a trailing zero so both numbers have the same number of decimal places is not required mathematically and helps enormously in practice.
This is where place-value understanding gets tested. To a child who really understands 14.61 + 30.31, the tenths column is not 'the first column after the point' — it is a place worth a tenth.
This sheet uses two-place decimals up to 49.95, with two decimal places, which is the form children meet most often in money and measurement — 43.96 + 11.13 is a fair example of it.
Estimation is the check that works best here. Rounding each number in 18.18 + 49.23 to the nearest whole gives a total that 67.41 has to be close to.
In US classrooms these adding decimals worksheets are commonly aligned with the decimal operations expectations for grade 5, though the exact wording varies from state to state.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 4.00 + 48.33 = | 52.33 | Watch for: lining the numbers up on the right |
| 2 | 18.18 + 49.23 = | 67.41 | Check: not estimating |
| 3 | 14.61 + 30.31 = | 44.92 | Look at: treating the two sides of the point as separate numbers |
| 4 | 6.24 + 17.78 = | 24.02 | Ask about: forgetting the trailing zero |
| 5 | 43.96 + 11.13 = | 55.09 | Watch for: losing the decimal point in the answer |
| 6 | 40.49 + 26.50 = | 66.99 | Check: regrouping across the decimal point incorrectly |
Here is one worked through. 18.18 + 49.23 gives 67.41. If your child arrives somewhere other than 67.41 on 18.18 + 49.23, look at the working rather than the answer: nearly every wrong result comes from a skipped step, not an unknown fact.
The item 18.18 + 49.23 is worth doing slowly. The answer to 18.18 + 49.23 is 67.41, and the route to it is the route every other problem on this sheet takes — which is why the sheet has 20 of them rather than one.
Every generated sheet carries its own key on a separate printed page, which lets a child self-mark without seeing the answers while they work.
Answers appear next to their question numbers, so a wrong item like 18.18 + 49.23 can be found in the key in a second and re-worked while it is still fresh.
The sheet is laid out to fit one page on both US Letter and A4. Leave the browser scaling at 100% and turn headers and footers off, and the 20 problems land inside the margins on either paper size.
To save these adding decimals worksheets instead of printing them, choose 'Save as PDF' in the printer list. You get the worksheet and the answer key as a single PDF, on Letter or A4 depending on your printer settings.
Print a sheet of adding decimals worksheets, run it for 10 minutes, mark it together, and come back tomorrow for a different set of numbers on the same skill.
Free printable math worksheets from a working math academy director in Korea. Problems come from our own code, not from a published workbook. Every sheet prints on US Letter or A4 with its answer key. All worksheets · Worksheet generator · Korean site
Last updated: 2026-09-13