Fill in the Operator or Number — printable template
Three problem types: fill in the operator, fill in the missing number, and "largest number that fits". Practise one type or mix them all.
Typical uses
- Inverse thinking with operators and equations
- Missing-number work that prepares pupils for algebra
- Times-table recall and largest-fit problems
- Reworking mistakes and timed drills
How to use
- 1Pick the template
Open the generator — this template is preselected
- 2Adjust settings
Set page size, margins and the template's own options
- 3Live preview
The preview refreshes instantly so you can confirm the layout
- 4Print or download
Print directly, or export PDF / PNG / SVG
Sizes and settings
| Paper | Letter (216×279) |
|---|---|
| Pages | 1 page(s) with the default Letter settings |
| 年级预设 | 一年级 |
| Problem type | Fill in the missing number □ |
| Digits in 1st number | 1 |
| Digits in 2nd number | 1 |
| Operations | Add + / Subtract − |
| Max value | 20 |
| Decimal places | Whole numbers |
| Problems per row | 4 |
| Row spacing | 0mm |
| Problems per page | 30 |
| Show problem numbers | On |
| Writing baseline | On |
| Problem colour | #26313d |
| Baseline colour | #c8d2dc |
| Answers | No answers |
| Answer colour | #b7c0c9 |
| Header (name / time) | On |
| Show score field | On |
| Seed | 1 |
These are the defaults for this template — every one of them can be changed in the editor.
Which export format?
Best for printing. Page dimensions are locked in millimetres and stay sharp at any zoom
For documents and web sharing. High-resolution 300 DPI bitmap
Lossless vector, editable in Illustrator or Inkscape
Fastest when you need it now — set scaling to 100%
FAQ
Which grades suit each type?
Missing numbers work from grade 1; missing operators usually come once multiplication and division are known (late grade 2 to grade 3); largest-fit problems are typically grade 4. The presets follow that order, and you can always override them.
How are the largest-fit problems made?
They are built backwards from the answer: to get 7, the generator prints "□ × 7 < 50" (7 × 7 = 49, just under 50). Every problem therefore has exactly one correct largest whole number.
Why are the printed dimensions wrong?
If your print dialogue has "Fit to page" enabled or scaling below 100%, the whole grid is scaled down. Set scaling to 100% / "Actual size", and tick the calibration ruler in the generator, then measure the 5 cm mark with a ruler. PDF dimensions are locked in the file, so they are the safest option.
Should I choose PDF, PNG or SVG?
Use PDF for printing and millimetre accuracy, PNG for documents and web sharing, and SVG for vector editing. Templates with Chinese tracing characters are exported as high-resolution raster PDFs so the glyphs stay intact; for vector-quality tracing, use "Print → Save as PDF".
Can I change the page size, colours and line weight?
Yes. The common settings cover page size (A4 / A5 / B5 / 16K / Letter / custom), orientation, margins, binding margin, background colour, page numbers, watermark and logo. Fill in the Operator or Number also has its own options in the "Template settings" panel.
Does anything I type or upload get sent to a server?
No. Generation, preview and export all happen inside your browser. Nothing is uploaded and no account is needed.
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