The worksheet generator on this page produces 1st grade math review 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. Right now the generator is set to problems such as 3 + 3 (answer 6) and 4 − 1 (answer 3); press the button again and the numbers change while the skill stays the same.
‘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.
Mixed practice is measurably harder and measurably more durable. Blocked practice on one skill produces faster progress in a session and less retention a month later.
A mixed sheet is a different test from a topic sheet. It asks whether the child can recognise which skill applies before applying it, which is exactly what a real assessment does. The first problem might be 3 + 3 and the next something completely different.
Because the mix regenerates, no two sessions test the same combination in the same order.
The problems here are drawn from across the grade's core skills, using single digits, 1 through 9.
These 1st grade math review worksheets are commonly aligned with the grade-level fluency expectations across strands, and the skill appears in most curricula somewhere around this point.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 3 + 3 = | 6 | Watch for: reading the operation sign carelessly |
| 2 | 4 − 1 = | 3 | Check: not marking by topic |
| 3 | 3 + □ = 10 | 7 | Look at: panicking at an unfamiliar shape |
| 4 | 7 + 7 = | 14 | Ask about: skipping the hard ones and never returning |
| 5 | 1 + 5 = | 6 | Watch for: applying the previous problem's method |
| 6 | 9 − 5 = | 4 | Check: slowing down at every switch |
A good first problem to do together is 3 + 3, which comes out at 6. Do 3 + 3 once with the child narrating, then hand over the pencil and start the clock on the other 20 problems.
Here is one worked through. 4 − 1 gives 3. If your child arrives somewhere other than 3 on 4 − 1, look at the working rather than the answer: nearly every wrong result comes from a skipped step, not an unknown fact.
The answer key is generated with the worksheet, not written by hand, so it always matches the sheet in front of you — 3 + 3 is listed as 6, 4 − 1 as 3, and so on down the page.
Answers appear next to their question numbers, so a wrong item like 4 − 1 can be found in the key in a second and re-worked while it is still fresh.
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.
If the problems look cramped, drop the count from 20 to a smaller number before printing these 1st grade math review worksheets; the font stays the same size and the spacing opens up.
When these become easy, move along the related links below rather than adding more problems to the same sheet.
→ Free 1st Grade Math Worksheets · → Free Mixed Review Worksheets
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