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One of my favorite math tricks
77,371 次观看 • 3 年前 •via X (Twitter)
9 条评论

johnroycroft.eth3 年前
Just started following and have shown all your tricks to my Y6 class. After 30 years of teaching, my passion for maths shortcuts is as strong as ever!

Pak Anira3 年前
Is that Willow Pill's shirt?????

Samantha Yammine, PhD3 年前
This trick is equally as iconic as the shirt and I didn't think that was possible

Ryan3 年前
You enthusiasm and energy is really positive. Oh and this is math witchcraft! 🙂

barry goldman3 年前
@heysciencesam ah.. all that fibonaci stuff!

Alexander Williams3 年前
Love this one Howie. It's fantastic combination of mental math with a touch of algebra.

AllisonAuction&Appraisal3 年前
Did not know the 11, kids never heard of the 9 trick. Can you do one on that so moms not crazy.

Reva Ahuja3 年前
@howie_hua - this is AWESOME

ZHONG XINA3 年前
nice tee
