Howie Hua

@howie_hua • 100,851 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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Videos

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Live Cam

Howie Hua

Shorts

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! How would you mentally calculate 95% of $300?

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

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

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

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

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

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

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

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

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

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

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 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 7.5 is 30% of my number, how would you figure out what my number is?

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

It's Mental Math Monday! How would you mentally calculate 8+10+12+14+16?

It's Mental Math Monday with sixth grade teacher Camden from North Dakota. How would you mentally calculate 25×16?

It's Mental Math Monday! How would you mentally calculate 81-39?

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

Videos

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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!

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

I have two shuffled 52 card decks. If I reveal one card from each deck at the same time and I exhaust the decks, what's the probability of flipping the same exact card at least once?

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 decimal representation for 1/7s is really cool

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).

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.

Which is greater: 2025²⁰²⁶ or 2026²⁰²⁵?

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

Here's a cool pattern: If we divide the first n positive odd numbers by the next n positive odd numbers, we will always get 1/3. Here's why this makes sense.

Will this answer surprise you? Or is it intuitive?

Can you draw this Poké ball without retracing or lifting your pen?

My response to "Why do you keep drawing so much? Just teach them the formula!"

What is this math homework asking for?

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?

Did you know you can subtract left to right?

One of the coolest math facts that I know is that the only circle that fits perfectly in a 3-4-5 right triangle has an area of pi. Here's how we can prove this.

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.

Why does a negative divided by a negative equal a positive? Why does a negative divided by a positive equal a negative? Here's how I would explain it to a 7th grader.

Why is 0!=1?