David Petro

I'm starting to really interact on davidpetro314.bsky.social as the math community is really growing and becoming active there. I haven't given up here, however. I still think the math community can work here too and these are my tips to make it so. #MathChat #MTBoS #iTeachMath

I remember learning about the associative property in school and remembered it was so boring, but it can help us with mental math!

Why do we always get 37 with this pattern?

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/07/math-l… Links and help from @TheErickLee @howie_hua @mathladyhazel and more #MathChat #MTBoS #iTeachMath

These trigonometric functions are so satisfying. [bit.ly/32a68vX]

Can you visualize fraction division on the number line? If not, give me around 90 seconds to explain it.

This math joke is hilarious!

...Oh, I thought I read sec(c).

[New Post] Ontario Math Links-My favourite #math related links from this week: ontariomath.blogspot.com/2025/07/math-l… Links & help from @jennalaib @howie_hua @Desmos & more #MathChat #MTBoS #iTeachMath

What's happening in the permutation and combination formulas? Let's make sense of them!

There’s a bunch of new slow reveal graphs up at slowrevealgraphs.com! -what fraction of Nobel Prize winners for science awards are immigrants? - where do Americans travel within the US? - what’s more expensive: a pound of a Porsche or a pound of pecorino? And more!

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/07/math-l… Links and help from @howie_hua @mathequalslove and more #MathChat #MTBoS #iTeachMath

Here is my credit card number. First come, first serve.

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/07/math-l… Links and help from @stevenstrogatz @howie_hua @pickover and more #MathChat #MTBoS #iTeachMath

Fun math fact: If you divide the first n positive odd numbers by the next n odd numbers, you will ALWAYS get 1/3. Here's why! (With a visual included!)

Math. Beautiful Universe. Don't you just love √3 here?

My "Math, Revealed" series is freely available to anyone -- no paywall! -- in the thread below

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/06/math-l… links and help from @howie_hua @stevenstrogatz @ProfSmudge and more #MathChat #MTBoS #iTeachMath

Give an insult, but make it mathematical.

This week's installment of Math, Revealed -- Let's Get Packing! Please retweet this gift link, which lets people see the article for free. nytimes.com/interactive/20…

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/06/math-l… links and help from @fawnpnguyen @howie_hua @mathequalslove and more #MathChat #MTBoS #iTeachMath