These 3 digit addition with regrouping 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. The version loaded below opens with items in the shape of 234 + 519 and 446 + 429; the key lists 753 and 875 next to their question numbers.
‘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.
Because the addends are regenerated every time, a child cannot learn the sheet instead of the skill. Yesterday's page may have asked for 215 + 467; today's asks something else in the same shape.
Written addition is worth practising in columns — which is what these 3 digit addition with regrouping worksheets ask for — even when a child working at this level can do it mentally, because the column layout is what makes four-digit work manageable later. A problem such as 182 + 719 is small enough to do mentally and worth writing out anyway.
Addition is the first place a child meets the idea of a carried digit, and it is the skill every later algorithm leans on. A sheet like 234 + 519 looks small, but the habit it builds — line up the places, work right to left, record the carry — is the same habit that survives into multi-digit multiplication.
The problems here use three-digit numbers that carry, which keeps the arithmetic honest without turning the page into a copying exercise. 234 + 519 and 446 + 429 are typical of the range.
Work of this kind is commonly aligned with the addition strand of most US state standards for this grade; schools outside the US meet the same skill at roughly the same age, which is why these 3 digit addition with regrouping worksheets travel well.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 234 + 519 = | 753 | Watch for: losing the place columns |
| 2 | 446 + 429 = | 875 | Check: counting on from the wrong number |
| 3 | 215 + 467 = | 682 | Look at: treating a longer number as a bigger one |
| 4 | 182 + 719 = | 901 | Ask about: forgetting the carried digit |
| 5 | 285 + 418 = | 703 | Watch for: guessing on the near-tens |
| 6 | 372 + 219 = | 591 | Check: adding right to left, then reading left to right |
Work 182 + 719 out loud as a demonstration. It gives 901. Children who hear 182 + 719 reasoned through once at the start of a session make noticeably fewer errors in the ten minutes that follow.
The item 446 + 429 is worth doing slowly. The answer to 446 + 429 is 875, 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.
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.
The answer key is generated with the worksheet, not written by hand, so it always matches the sheet in front of you — 234 + 519 is listed as 753, 446 + 429 as 875, and so on down the page.
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.
Printing works the same on US Letter and A4, because the layout uses relative widths rather than fixed inches. Set margins to default and scaling to 100%, and all 20 problems fit.
When these become easy, move along the related links below rather than adding more problems to the same sheet.
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