What is a fill-in-the-missing-numbers worksheet?

A crossword-style grid of equations where some numbers are blank. Students use inverse operations and logic to fill every blank so all equations remain true.

Which operations are supported?

Addition, subtraction, multiplication, and division. Pick any combination — at least one must stay selected.

What does the blank ratio slider do?

It sets what percentage of numbers are hidden in each puzzle. Lower values scaffold beginners; higher values increase challenge.

Why did I get fewer equations than I asked for?

The generator skips duplicate puzzles within a pack. If the target is too high for the settings, you'll see a shortfall warning — lower the count or re-shuffle.

Is an answer key included?

Yes — download puzzle-only, solution-only, or combined PDF from the Download menu.

Does it work on Chromebook and iPad?

Yes — runs in any modern browser, no install required.

Is this worksheet maker really free to use?

Yes — start without a credit card. Manual mode is always free to use and does not spend AI word credits. On the free plan you get 5,000 lifetime AI words (one trial per network), up to 10 PDF downloads per day, and a subtle eduzuma.com watermark on exports. Basic, Pro, and School plans remove the watermark, lift daily limits, and include a commercial resale license.

Do my PDF downloads have a watermark?

Free-plan and guest PDFs include a small eduzuma.com footer watermark. Paid plans (Basic, Pro, School) deliver 100% watermark-free PDFs — the upgrade most teachers and KDP publishers choose.

Is there a daily download limit?

Free and guest users can download up to 10 PDFs per day (tracked in the app). Paid plans include unlimited daily downloads.

Can I sell worksheets or puzzle books commercially?

Classroom and personal use are included on the free plan. Selling on Teachers Pay Teachers, Amazon KDP, Etsy, or similar requires Basic, Pro, or School — each includes a royalty-free commercial license and watermark-free PDFs.

Can I download multi-page worksheet packs on the free plan?

The free plan exports one page per generation. Basic supports up to 5 pages per click; Pro and School support unlimited multi-page packs — ideal for workbook sets, puzzle books, and full classroom packets.

Dashboard

Fill in the Missing Numbers

Math

Crossword-style equations with missing numbers — mix +, −, ×, ÷.

Free Fill in the Missing Numbers Maker — Printable Crossword-Style Math Worksheets

Free fill-in-the-missing-numbers math worksheet generator. Crossword-style equations with +, −, ×, ÷, adjustable blanks, PDF + PNG, and answer key.

Free to StartNo Sign-UpPDF + PNGAnswer KeyK–8 Math

Fill in the Missing Numbers

Show answers

Generating…

Free Fill in the Missing Numbers Maker — Printable Crossword-Style Math Worksheets

Generate crossword-style math worksheets where students fill in missing numbers so every equation is correct. Mix addition, subtraction, multiplication, and division, tune Easy/Medium/Hard difficulty, and control how many blanks appear. One puzzle per page with print-ready PDF + PNG and a matching answer key.

Crossword-Style Layout

Equations arranged in an interlocking grid — more engaging than a plain problem list.

Mix Any Operations

Toggle +, −, ×, ÷ freely or focus on one operation for targeted practice.

PDF + PNG + Answer Key

Download puzzle-only, solution-only, or both — A4 or US Letter.

How to make a fill-in-the-missing-numbers worksheet in 6 steps

From blank page to printable worksheet in under a minute.

1
Set equation count
Choose how many equations appear on each page (up to your target count).
2
Pick operations
Select any mix of +, −, ×, ÷ — at least one operation must stay on.
3
Choose difficulty
Easy, Medium, or Hard adjusts number sizes and equation complexity.
4
Adjust blank ratio
Slide the blank percentage to control how many numbers students must find.
5
Add pages
Build multi-page packs — duplicate puzzles are automatically skipped.
6
Download from the menu
Export puzzle PDF, solution PDF, both, or PNG — A4 or US Letter.

Everything in a missing-numbers math worksheet generator

Mix +, −, ×, ÷

Easy / Medium / Hard

Adjustable blank ratio

PDF + PNG export

Built-in answer key

Crossword-style grid

A4 & US Letter

Free to start; watermark-free on paid

Single-operation focus

Addition-only sheets for K–2 fluency
Multiplication-only for times-table practice
One skill per worksheet for intervention
Re-shuffle for a fresh puzzle instantly

Mixed-operation challenge

Combine +, −, ×, ÷ in one grid
Harder difficulty for upper grades
Higher blank ratio for true problem-solving
Multi-page packs for homework and centers

Who uses fill-in-the-missing-numbers worksheets?

Math teachers

Mental math, inverse operations, and equation sense.

Homeschool parents

Custom arithmetic practice beyond plain drills.

Tutors

Targeted remediation with adjustable difficulty.

Intervention specialists

Scaffolded blanks for building number fluency.

Parents

Extra practice sheets with answer keys for home checking.

Math centers

Self-checking stations with solution PDFs.

Commercial Use Allowed

Members

If you have an active membership plan, you may use the generated worksheets and puzzles for commercial purposes — including selling them to end users on Etsy, Amazon KDP, TPT (Teachers Pay Teachers), WooCommerce & more.

Free plan: personal & classroom use with a subtle PDF watermark. Paid plans (Basic, Pro, School) unlock watermark-free exports and royalty-free resale on TPT, KDP, Etsy & more.

Pro tips for stronger missing-number worksheets

Start with addition-only and 20–30% blanks for beginners.
Raise the blank ratio to 50–60% once students know the operations.
Use mixed operations on Medium/Hard for grades 4–6 review.
Pair with Number Grid or Math Squares for a full puzzle packet.
If fewer equations generate than requested, lower the count or re-shuffle — the app warns you.
Print solution PDFs separately for quick teacher grading.