David Petersen
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calcdave.bsky.social
David Petersen
@calcdave.bsky.social
400 followers 440 following 130 posts
A fisher of minds in central Ohio
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calcdave.bsky.social
Black men wearing boards that say "I AM A MAN" walking past US soldiers pointing bayonettes at them.
August 1, 2025 at 9:53 PM
calcdave.bsky.social
Photo for reference
Girl pointing out parts of building she made with blue blocks usually used to represent place values in match education
June 23, 2025 at 1:05 PM
calcdave.bsky.social
@triangleman.bsky.social Message from my wife while I work this morning.
Text message bubbles reading: "Alice is still building a house/furniture/people with the blue blocks. And part of me wants to say 'these are for math, you're doing it wrong' but then she'll say stuff like 'this tv is huge it's...counts number of 10 sticks...sixty blocks!' Or 'these people are tiny. they're only 3 blocks tall. Wait, no, they're TWO blocks TALL, but they're made of three blocks. And I guess this is how she's going to learn match and I should just roll with it."
June 23, 2025 at 12:29 PM
calcdave.bsky.social
Free jeans?!
Screenshot of a deal on Levi's Men's Jeans Memorial Day Deal. Listed for "Up to 60% off + extra 40% off."
May 23, 2025 at 1:34 AM
calcdave.bsky.social
Now that's what I call a reflexive property!
An equation showing 2 + 1 + 5 on the first line. Then = 8 = on the second line. And 5 + 1 + 2 on the third line. The entire image then rotates, flips horizontally, then flips vertically to show the same 3 lines through symmetry of the way the numbers are written.
December 24, 2024 at 8:37 PM
calcdave.bsky.social
Two blue stickers that say “I belong. #MTBOS”
December 2, 2024 at 2:50 PM
calcdave.bsky.social
I think I need the last panel of this comic on business cards.

poorlydrawnlines.com/comic/trivia/
Mouse: Can I be on your trivia team tonight? Bird: Mouse, no. You just guess everything. Turtle: You said elephants are amphibians. Bird: Mouse, you're like...what's the opposite of an asset? Turtle: A liability. Bird: You're a liability. Mouse (thinking): Feels like I should be offended, but I don't know what that word means. Mouse (aloud): Thank you? Or go to hell.
November 13, 2024 at 10:45 PM