The worksheet generator on this page produces expanded form 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. The current sheet starts with problems like Write 662 in expanded form and Write 189 in expanded form, and the answers (600 + 60 + 2 and 100 + 80 + 9) are printed on the key so marking takes about a minute.
‘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 sheet regenerates, the same place is not asked about twice in a row, so the child has to locate the position each time rather than remember where it was on the last sheet, which uses three-digit numbers, and a typical line looks like Write 363 in expanded form.
Place value is the idea that a digit's position decides its size, and a question like Write 662 in expanded form checks that directly. A child who answers 600 + 60 + 2 without counting positions on their fingers has internalised the structure; one who counts has not, yet.
Nearly every later arithmetic error traces back to place value: misaligned columns, a lost zero, a decimal point in the wrong slot. Ten minutes a day here quietly fixes problems that look like they belong to other topics.
This sheet uses three-digit numbers, which is wide enough to force real reading of the digits rather than pattern-matching on length — Write 363 in expanded form is a fair example of it.
Teachers usually place expanded form worksheets alongside the number and operations in base ten strand for this grade, which is where the skill sits in the majority of US state frameworks.
| # | Problem | Answer | What to check |
|---|---|---|---|
| 1 | Write 662 in expanded form = | 600 + 60 + 2 | Watch for: mixing up tens and ones vocabulary |
| 2 | Write 189 in expanded form = | 100 + 80 + 9 | Check: losing track in long numbers |
| 3 | Write 568 in expanded form = | 500 + 60 + 8 | Look at: confusing the digit with its value |
| 4 | Write 401 in expanded form = | 400 + 1 | Ask about: skipping the zero |
| 5 | Write 363 in expanded form = | 300 + 60 + 3 | Watch for: counting from the wrong end |
| 6 | Write 998 in expanded form = | 900 + 90 + 8 | Check: reading a comma as a decimal point |
Take the first problem on the sheet as it stands, Write 662 in expanded form. Work Write 662 in expanded form out on paper rather than in your head the first few times, say each step aloud, and check the result against 600 + 60 + 2 on the key before moving on.
The item Write 189 in expanded form is worth doing slowly. The answer to Write 189 in expanded form is 100 + 80 + 9, 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.
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.
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 600 + 60 + 2 for Write 662 in expanded form.
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.
To save these expanded form 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.
Keep the finished expanded form worksheets in date order — the drop in time across ten sheets is the clearest progress report you will get.
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