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Howie Hua

@howie_hua • 100,956 subscribers

I teach math to future elementary school teachers at Fresno State. I make math memes and explainer videos. https://t.co/ks70O6RaFv

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It's Mental Math Monday! How would you mentally calculate 95% of $300?

It's Mental Math Monday! How would you mentally calculate 95% of $300?

2,165,069 次观看

It's Mental Math Monday! How would you mentally calculate this: 75 is 30% of _____?

It's Mental Math Monday! How would you mentally calculate this: 75 is 30% of _____?

298,473 次观看

It's Mental Math Monday! What goes on in your head when you're mentally calculating 12×25?

It's Mental Math Monday! What goes on in your head when you're mentally calculating 12×25?

243,622 次观看

It's mental math Monday. How would you mentally calculate 48+49?

It's mental math Monday. How would you mentally calculate 48+49?

946,178 次观看

I don't mean to start any drama or anything but would you round 0.49999... to 0 or 1?

I don't mean to start any drama or anything but would you round 0.49999... to 0 or 1?

79,814 次观看

It's Mental Math Monday! Is 15.99/3.99 greater than 4, less than 4, or equal to 4? How are you thinking about it?

It's Mental Math Monday! Is 15.99/3.99 greater than 4, less than 4, or equal to 4? How are you thinking about it?

80,249 次观看

It's Mental Math Monday! How would you mentally calculate 135-57?

It's Mental Math Monday! How would you mentally calculate 135-57?

385,159 次观看

Its Mental Math Monday. How would you mentally calculate the total?

Its Mental Math Monday. How would you mentally calculate the total?

314,645 次观看

It's Mental Math Monday! Is 3.01/12.01 greater than, less than, or equal to 1/4? Please share how you would mentally do this.

It's Mental Math Monday! Is 3.01/12.01 greater than, less than, or equal to 1/4? Please share how you would mentally do this.

45,825 次观看

It's Mental Math Monday. How would you mentally calculate 2023-1976?

It's Mental Math Monday. How would you mentally calculate 2023-1976?

258,757 次观看

It's Mental Math Monday with math teacher Quinn from Missouri! How would you mentally calculate 25×35?

It's Mental Math Monday with math teacher Quinn from Missouri! How would you mentally calculate 25×35?

24,244 次观看

For today's Mental Math Monday, how would you mentally calculate this: 60 is 40% of ___?

For today's Mental Math Monday, how would you mentally calculate this: 60 is 40% of ___?

136,528 次观看

It's Mental Math Monday! What goes on in your head when you're mentally calculating 17+18?

It's Mental Math Monday! What goes on in your head when you're mentally calculating 17+18?

180,249 次观看

It's Mental Math Monday! If 20 cookies cost $36, how would you mentally calculate the cost of 6 cookies?

It's Mental Math Monday! If 20 cookies cost $36, how would you mentally calculate the cost of 6 cookies?

180,190 次观看

It's Mental Math Monday! If a pair of pants cost $80 but you have a 20% off coupon, how would you mentally calculate the new cost?

It's Mental Math Monday! If a pair of pants cost $80 but you have a 20% off coupon, how would you mentally calculate the new cost?

168,502 次观看

It's Mental Math Monday! How would you mentally calculate 2.5×24?

It's Mental Math Monday! How would you mentally calculate 2.5×24?

49,973 次观看

It's Mental Math Monday! How would you mentally calculate 112-49?

It's Mental Math Monday! How would you mentally calculate 112-49?

41,169 次观看

It's Mental Math Monday! Let's practice division. How would you mentally calculate 468÷3?

It's Mental Math Monday! Let's practice division. How would you mentally calculate 468÷3?

123,375 次观看

It's Mental Math Monday! How would you mentally calculate 47+48?

It's Mental Math Monday! How would you mentally calculate 47+48?

18,374 次观看

Can you solve this math riddle by Eli: What number with one syllable has the highest value?

Can you solve this math riddle by Eli: What number with one syllable has the highest value?

70,556 次观看

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California ran out of license plates of the form 1ABC234 so I was curious, how many license plates did we go through?

California ran out of license plates of the form 1ABC234 so I was curious, how many license plates did we go through?

29,088 次观看 • 4 天前

$A fraction comparison strategy: Comparing to 1/2$

A fraction comparison strategy: Comparing to 1/2

39,793 次观看 • 8 天前

If you are driving to your friend's house at an average speed of 40 mph and you take the same route back at an average speed of 60 mph, what was your overall speed? It is NOT 50 mph. Let's learn about the harmonic mean.

If you are driving to your friend's house at an average speed of 40 mph and you take the same route back at an average speed of 60 mph, what was your overall speed? It is NOT 50 mph. Let's learn about the harmonic mean.

35,671 次观看 • 11 天前

Which Pokémon encounter is more likely: Bellsprout (a 20% encounter rate) in 5 encounters or Clefairy (a 1% encounter rate) in 100 encounters?

Which Pokémon encounter is more likely: Bellsprout (a 20% encounter rate) in 5 encounters or Clefairy (a 1% encounter rate) in 100 encounters?

285,448 次观看 • 5 个月前

If you repeatedly flip a coin, which sequence is more likely to appear first: HTT or TTH? Believe it or not, one is 3 times more likely to appear first!

If you repeatedly flip a coin, which sequence is more likely to appear first: HTT or TTH? Believe it or not, one is 3 times more likely to appear first!

228,667 次观看 • 5 个月前

When I was in high school, I didn't realize difference of two squares literally meant "What's the difference between these two squares?" Here's how we can visually show why x²-y²=(x-y)(x+y).

When I was in high school, I didn't realize difference of two squares literally meant "What's the difference between these two squares?" Here's how we can visually show why x²-y²=(x-y)(x+y).

347,562 次观看 • 9 个月前

Which is greater: 2025²⁰²⁶ or 2026²⁰²⁵?

Which is greater: 2025²⁰²⁶ or 2026²⁰²⁵?

308,579 次观看 • 10 个月前

The probability of finding a Pikachu in Viridian Forest is 5% so you just need 20 encounters to ensure finding a Pikachu, right? Math doesn't work out like that. Let's do the math to find the probability of encountering at least one Pikachu in 20 encounters.

The probability of finding a Pikachu in Viridian Forest is 5% so you just need 20 encounters to ensure finding a Pikachu, right? Math doesn't work out like that. Let's do the math to find the probability of encountering at least one Pikachu in 20 encounters.

161,216 次观看 • 5 个月前

Will this answer surprise you? Or is it intuitive?

Will this answer surprise you? Or is it intuitive?

462,982 次观看 • 1 年前

I heard University of California students have trouble with 1/2 + 1/3 so let's talk about it

I heard University of California students have trouble with 1/2 + 1/3 so let's talk about it

34,927 次观看 • 1 个月前

Which is greater: 50⁹⁹ or 99!

Which is greater: 50⁹⁹ or 99!

22,690 次观看 • 23 天前

My college students said they wish they were taught this way of finding the greatest common factor when they were in school

My college students said they wish they were taught this way of finding the greatest common factor when they were in school

18,060 次观看 • 18 天前

The decimal representation for 1/7s is really cool

The decimal representation for 1/7s is really cool

135,110 次观看 • 6 个月前

I know this is controversial but I'm saying it anyway: 8×3 and 3×8 are saying different things.

I know this is controversial but I'm saying it anyway: 8×3 and 3×8 are saying different things.

166,657 次观看 • 9 个月前

This is a very common misconception in statistics: If 1% of a population has a disease and the tests have a 5% chance of giving a false positive, what's the probability of having the disease given that we tested positive? The answer is NOT 95%. It's actually way less.

This is a very common misconception in statistics: If 1% of a population has a disease and the tests have a 5% chance of giving a false positive, what's the probability of having the disease given that we tested positive? The answer is NOT 95%. It's actually way less.

96,344 次观看 • 5 个月前

How do we do this "new" way of dividing?

How do we do this "new" way of dividing?

22,315 次观看 • 1 个月前

Why is 0!=1?

Why is 0!=1?

327,460 次观看 • 2 年前

Today's date, 9/25/2025, is probably the last date of our lifetime where the month, day, and year are all square numbers 😱 Next time this will happen is 1/1/2116.

Today's date, 9/25/2025, is probably the last date of our lifetime where the month, day, and year are all square numbers 😱 Next time this will happen is 1/1/2116.

148,233 次观看 • 1 年前

If it takes Elmo 6 minutes to build a snowman and Rocco 7 minutes to build a snowman, how fast can they build a snowman if they worked together?

If it takes Elmo 6 minutes to build a snowman and Rocco 7 minutes to build a snowman, how fast can they build a snowman if they worked together?

124,801 次观看 • 10 个月前

Do you know of this fun subtraction strategy?

Do you know of this fun subtraction strategy?

33,472 次观看 • 2 个月前