#mentalmath — Public Fediverse posts

New blog post: Someone in a video call mentioned they just moved to Bali. Another friend lives in Osaka. They asked half-jokingly which is closer to us in Hanoi. I said Osaka before they had Maps open.

Didn't fully clock until later that I've had a system for this the whole time, accidental trigonometry moment lol :meowBox:

https://jarema.me/blog/2026/05/timezone-distance/

#blog #geography #mentalmath #100DaysToOffload (6/100)

Strengthen mental maths daily.
#MentalMath #Addition #MathQuiz #Education #GK #QuizTime

Một nhà phát triển đã ra mắt MonkeyMac, trò chơi web kết hợp thử thách gõ phím tốc độ (như MonkeyType) và luyện tính nhẩm (như ZetaMac). Trò chơi miễn phí, không cần đăng ký (tùy chọn theo dõi tiến độ), giúp cải thiện tốc độ tính toán và phản xạ.
#Game #MathGame #SpeedTyping #MentalMath #WebGame #TròChơi #ToánHọc #TínhNhẩm #GõPhímNhanh

https://www.reddit.com/r/programming/comments/1o3d9mx/i_combined_zetamac_and_monkeytype_into_the_best/

For Americans Only: Estimating Celsius and Other Mental Metrics - I know many computer languages, but I’ve struggled all my life to learn a second h... - https://hackaday.com/2025/08/14/for-americans-only-estimating-celsius-and-other-mental-metrics/ #hackadaycolumns #mentalmath #metric #rants

For Americans Only: Estimating Celsius and Other Mental Metrics https://hackaday.com/2025/08/14/for-americans-only-estimating-celsius-and-other-mental-metrics/ #HackadayColumns #mentalmath #metric #Rants

Today's Poll....

What is the value of this? 8 + 2 × (5² − 3) ÷ 2

#MentalMath #STEMFun #PuzzleTime #TuxAcademy #MathIsFun #Poll #Datascience #AI #Tech

I've been quiet lately as I've been working on a free game. It's called Mathio Whirled and mixes mental arithmetic with a traditional platformer. It was fun writing it, but time to get back drawing.

If you want to play it, you can find it at https://henspace.itch.io/mathio-whirled

#indiedev #indiegames #maths #mentalmath #mentalarithmetic #games #platformer #itchio #gdevelop

#mathe #FediLZMathe #mentalmath #MentalMathMonday ##WieRechnestDu so, hier einmal @howie_hua in Action mit der gestrigen Kopfrechenidee https://www.tiktok.com/@howie_hua/video/7243802628885433646

"Word riddles at the public library" https://www.youtube.com/watch?v=EvSxhyJhfM8

Fun questions to ask nieces, nephews, grandkids -- and other nice people -- at Thanksgiving -- or any other time of year. Encourage people to invent their own original questions.

See also - "Coin questions at the library" https://www.youtube.com/watch?v=M11WT3H_DqU suitable from kindergarten all the way up to high school.

#mtbos #edutwitter #riddles #informaleducation #mentalmath #puzzles