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Turn your mental math notes into flashcards with AI

Upload a PDF, slide deck, notes or a photo of your practice sheet and get flashcards for squares, percentages and quick multiplication tricks. Review them with spaced repetition in your browser.

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Free account · 3 sets a month · Creates flashcards in seconds

Why short daily drills build mental math speed

Drilling squares, percentages and tip math every day builds speed. A mental math flashcards app keeps those drills short and focused, so you practice the exact skills your notes cover.

  • Squares and square roots of common numbers
  • Percent conversions and quick tip math
  • Multiplication tricks for 5, 9 and 11
  • Estimation drills to check answers fast
Example mental math flashcards for daily practice
What is 15% of 80?12. Ten percent of 80 is 8, and half of that is 4, so 8 + 4 = 12.
How do you multiply a two-digit number by 11?Add the two digits and place the sum in the middle, carrying if it is 10 or more. Example: 47 × 11 = 517.
How do you square a number that ends in 5?Multiply the tens digit by the next whole number, then write 25 at the end. Example: 65² = 4225.
What is 1/8 as a percent?12.5%. Since 1/8 = 0.125, multiply by 100 to get the percent.
Estimate 39 × 21 quickly.Round to 40 × 20 = 800 for a fast estimate. The exact answer is 819.
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Cards from your own material

Upload PDFs, slides, notes or photos of worksheets and get flashcards generated from them.

Spaced repetition

Cards you miss come back sooner, so drills stick without rereading everything.

Study in the browser

Practice on any device with a browser. The free plan includes 3 generations per month.

How it works

Upload your material

Add a PDF, slide deck, text notes or a photo of your practice sheet.

Review the cards

Check the generated questions and answers and edit anything that looks off.

Practice daily

Run short sessions with spaced repetition so each skill keeps getting reviewed.

Short, repeated drills work best for mental math because speed comes from recognizing patterns, not from long sessions. Keep each deck focused on one skill, such as squares, percentages or tip calculations, and review it for five to ten minutes a day.

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Frequently asked questions

How do I practice mental math without a calculator?

Practice for a few minutes each day and learn one method at a time, such as multiplying by 11 or finding 10 percent by moving the decimal point. Checking answers with quick estimates helps you catch mistakes early.

Which mental math skills should I drill first?

Start with adding and subtracting two-digit numbers, then multiplying by 5 and 10. Percentages and squares of common numbers come next, since they build on those basics.

Can I export my mental math flashcards?

Yes, on the paid Plus plan you can export to PDF, DOCX, Anki and CSV. The free plan lets you study in the browser but does not include exports.

Is there a free plan?

Yes. The free plan includes 3 generations per month and browser study, and you do not need a credit card to start.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.