This page makes free printable 3rd grade math review 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 3 × 3 and 10 ÷ 2 on the printed page, with 9 and 5 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.
Expect the score to drop when a child first moves from topic sheets to mixed sheets. That drop is information, not failure — it shows which skills were only situationally available.
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.
The problems here are drawn from across the grade's core skills, using both factors from 2 to 12.
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.
Work of this kind is commonly aligned with the grade-level fluency expectations across strands; schools outside the US meet the same skill at roughly the same age, which is why these 3rd grade math review worksheets travel well.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | 3 × 3 = | 9 | Watch for: reading the operation sign carelessly |
| 2 | 10 ÷ 2 = | 5 | Check: applying the previous problem's method |
| 3 | 171 + 420 = | 591 | Look at: skipping the hard ones and never returning |
| 4 | 739 − 367 = | 372 | Ask about: panicking at an unfamiliar shape |
| 5 | 6 × 12 = | 72 | Watch for: not marking by topic |
| 6 | 144 ÷ 12 = | 12 | Check: slowing down at every switch |
Work 739 − 367 out loud as a demonstration. It gives 372. Children who hear 739 − 367 reasoned through once at the start of a session make noticeably fewer errors in the ten minutes that follow.
A good first problem to do together is 3 × 3, which comes out at 9. Do 3 × 3 once with the child narrating, then hand over the pencil and start the clock on the other 20 problems.
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 for 3 × 3.
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 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 3rd 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 3rd 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