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Turn any worksheet or notes into number matching flashcards

Upload a PDF, slide deck, set of notes or a photo of a page, and get flashcards that pair numerals, number words, fractions and decimals so you can drill them until they stick.

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Why build your own set

Printed sheets are handy for a quick drill, but number matching flashcards built from your own class material cover the exact pairs your teacher will test.

Match numerals to number words, like 12 and twelve.
Pair fractions with their decimal and percentage forms.
Connect Roman numerals with Arabic values, such as XIV and 14.
Review missed pairs with spaced repetition instead of rereading the whole list.

Example number matching flashcards for math

Which number word matches the numeral 12?Twelve. Matching numerals to number words builds the recognition needed for reading and writing amounts.

Match the fraction 3/4 to its decimal value.0.75. Dividing 3 by 4 gives the decimal, so 3/4 and 0.75 name the same amount.

What Arabic number matches the Roman numeral XIV?14. X is 10 and IV is 4, so XIV is 10 plus 4.

Match 1,000,000 to its scientific notation.1 × 10^6. The exponent counts how many places the decimal point moves, here six places.

What is 9 squared, and which number does it match?81. Squaring 9 means multiplying 9 by itself, so 9² equals 81.

Generate the full set

Built from your material

Upload PDFs, DOCX or PPTX files, plain notes, or photos of a worksheet. Pairs come from the content your teacher actually uses.

Spaced repetition

Cards you miss come back sooner and cards you know fade into longer gaps, so practice time goes to the pairs you still mix up.

Study anywhere

Review in your browser on the free plan. Paid plans add PDF, DOCX, Anki and CSV export for printing or studying offline.

How it works

Upload your source

Add the file or photo that has the numbers you need to match, such as a worksheet, lecture slides or your own notes.

Generate the pairs

DeckOwl reads the text and builds flashcards with a number on one side and its match on the other.

Review daily

Study in short sessions. Spaced repetition schedules the cards you miss so they come back before you forget them.

A generic sheet might match 7 to seven objects, while your course may use Roman numerals, scientific notation or percentages. Starting from your notes keeps the practice aligned with what you need to know.

Work in small batches. Separate whole numbers from decimals and fractions, then mix them once each group feels automatic.

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Frequently asked questions

How many number matching pairs should one flashcard set include?

Start with 20 to 30 pairs so each session stays short enough to repeat daily. Split larger sets by topic, such as whole numbers versus decimals, so you can review one skill at a time.

What kinds of number matching should I practice first?

Begin with numerals paired to number words and quantities, then move to fractions, decimals and percentages. Mixed sets work best once the basic pairs feel automatic.

Can I export these flashcards to Anki?

Yes, but export to Anki is a paid feature on the Plus plan at $39/year or $7.99/month. The free plan lets you study in the browser with 3 generations per month.

Can I upload a photo of a worksheet instead of a file?

Yes, photos of pages are read with text recognition, so you can upload them directly. Check the generated pairs against the original page before you rely on them.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.