This page makes free printable 4th grade addition worksheets on demand: press the button and you get a new sheet of 20 problems with a matching answer key, ready for US Letter or A4 paper. You will see items like 8,617 + 1,198 and 6,354 + 3,440 on the printed page, with 9,815 and 9,794 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 four-digit numbers up to 9,999, which keeps the arithmetic honest without turning the page into a copying exercise. 8,617 + 1,198 and 6,354 + 3,440 are typical of the range.
What separates a confident adder from a slow one is rarely the method; it is whether the number bonds underneath are automatic. Watch how long the child hesitates before writing the first digit of 9,794.
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 8,617 + 1,198 the answer 9,815 should come from memory, not from counting.
Because the addends are regenerated every time, a child cannot learn the sheet instead of the skill. Yesterday's page may have asked for 7,579 + 1,807; today's asks something else in the same shape.
In US classrooms these 4th grade addition worksheets are commonly aligned with the addition strand of most US state standards for this grade, though the exact wording varies from state to state.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 8,617 + 1,198 = | 9,815 | Watch for: counting on from the wrong number |
| 2 | 6,354 + 3,440 = | 9,794 | Check: losing the place columns |
| 3 | 7,579 + 1,807 = | 9,386 | Look at: treating a longer number as a bigger one |
| 4 | 1,300 + 4,351 = | 5,651 | Ask about: guessing on the near-tens |
| 5 | 1,311 + 2,692 = | 4,003 | Watch for: forgetting the carried digit |
| 6 | 1,775 + 4,913 = | 6,688 | Check: adding right to left, then reading left to right |
Try 7,579 + 1,807 together before letting the child start alone. The answer to 7,579 + 1,807 is 9,386, and talking through how it was reached takes about a minute and saves several minutes of guessing later in the sheet.
Work 1,300 + 4,351 out loud as a demonstration. It gives 5,651. Children who hear 1,300 + 4,351 reasoned through once at the start of a session make noticeably fewer errors in the ten minutes that follow.
Because the numbers are random, there is no shared answer list to look up: the key printed behind your sheet is the only one that fits it, and it shows 9,815 for 8,617 + 1,198.
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.
To save these 4th grade addition 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.
For a class set, print one sheet, press the new-worksheet button and print again. Each child gets different numbers on the same skill, so nobody can copy the answer to 8,617 + 1,198 from a neighbour.
Print a sheet of 4th grade addition worksheets, run it for 10 minutes, mark it together, and come back tomorrow for a different set of numbers on the same skill.
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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