Use this page when you want 3 digit plus 2 digit addition worksheets in the next thirty seconds: choose how many problems you want, press print, and the answer key comes out on its own page behind the worksheet. You will see items like 748 + 66 and 307 + 40 on the printed page, with 814 and 347 waiting on the answer key so nobody has to redo the arithmetic.
‘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.
The problems here use a three-digit number plus a two-digit number, which keeps the arithmetic honest without turning the page into a copying exercise. 748 + 66 and 307 + 40 are typical of the range.
Fluency in addition is usually described in two parts: knowing the single-digit facts by recall, and applying a written method to bigger numbers. This sheet exercises whichever of the two the number range implies — for 748 + 66 the answer 814 should come from memory, not from counting.
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 748 + 66 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.
Because the addends are regenerated every time, a child cannot learn the sheet instead of the skill. Yesterday's page may have asked for 544 + 25; today's asks something else in the same shape.
These 3 digit plus 2 digit addition worksheets are commonly aligned with the addition strand of most US state standards for this grade, and the skill appears in most curricula somewhere around this point.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 748 + 66 = | 814 | Watch for: losing the place columns |
| 2 | 307 + 40 = | 347 | Check: counting on from the wrong number |
| 3 | 544 + 25 = | 569 | Look at: guessing on the near-tens |
| 4 | 425 + 69 = | 494 | Ask about: adding right to left, then reading left to right |
| 5 | 732 + 17 = | 749 | Watch for: forgetting the carried digit |
| 6 | 263 + 17 = | 280 | Check: treating a longer number as a bigger one |
Work 425 + 69 out loud as a demonstration. It gives 494. Children who hear 425 + 69 reasoned through once at the start of a session make noticeably fewer errors in the ten minutes that follow.
Take the first problem on the sheet as it stands, 748 + 66. Work 748 + 66 out on paper rather than in your head the first few times, say each step aloud, and check the result against 814 on the key before moving on.
Keys are produced by the same code that produces the questions, so a mismatch between question and answer is not possible on these sheets.
Answers appear next to their question numbers, so a wrong item like 307 + 40 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.
If the problems look cramped, drop the count from 20 to a smaller number before printing these 3 digit plus 2 digit addition worksheets; the font stays the same size and the spacing opens up.
One sheet of 3 digit plus 2 digit addition worksheets a day for two weeks will tell you more about where a child working at this level actually stands than any single long assessment.
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