The worksheet generator on this page produces 5th grade adding decimals worksheets with real, freshly randomised numbers — 20 of them per sheet by default — plus the answer key a parent or teacher needs to mark it quickly. A typical problem from the sheet in front of you is 24.10 + 44.00, which works out to 68.10; another is 41.38 + 44.76, giving 86.14.
‘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.
This is where place-value understanding gets tested. To a child who really understands 20.78 + 24.38, the tenths column is not 'the first column after the point' — it is a place worth a tenth.
Because the numbers regenerate, the alignment has to be handled fresh each time rather than copied from a previous layout.
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 — 18.43 + 44.54 is a fair example of it.
Adding decimals is column addition with one extra rule: the decimal points line up. Get that right and 24.10 + 44.00 is no harder than the whole-number version; get it wrong and the answer is not remotely 68.10.
In US classrooms these 5th grade 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 | 24.10 + 44.00 = | 68.10 | Watch for: treating the two sides of the point as separate numbers |
| 2 | 41.38 + 44.76 = | 86.14 | Check: lining the numbers up on the right |
| 3 | 20.78 + 24.38 = | 45.16 | Look at: losing the decimal point in the answer |
| 4 | 1.52 + 17.78 = | 19.30 | Ask about: regrouping across the decimal point incorrectly |
| 5 | 18.43 + 44.54 = | 62.97 | Watch for: forgetting the trailing zero |
| 6 | 2.50 + 42.50 = | 45.00 | Check: not estimating |
Take the first problem on the sheet as it stands, 24.10 + 44.00. Work 24.10 + 44.00 out on paper rather than in your head the first few times, say each step aloud, and check the result against 68.10 on the key before moving on.
Try 20.78 + 24.38 together before letting the child start alone. The answer to 20.78 + 24.38 is 45.16, and talking through how it was reached takes about a minute and saves several minutes of guessing later in the sheet.
Answers appear next to their question numbers, so a wrong item like 41.38 + 44.76 can be found in the key in a second and re-worked while it is still fresh.
The key prints on its own page by default. Uncheck the answer-key box before printing if you would rather keep it back and mark the sheet yourself.
Portrait orientation is what the sheet is designed for. Landscape works but wastes about a third of the paper, so leave the orientation alone unless you have a reason.
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.
One sheet of 5th grade adding decimals worksheets a day for two weeks will tell you more about where a 5th grader actually stands than any single long assessment.
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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