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Education

Math professor shows how adding and subtracting left to right is actually easier and faster

Mind. Blown.

math tricks
Howie Hua/TikTok

Howie Hua shares helpful math tips and tricks on social media.

Math is weird.

On the one hand, it's consistent—the solutions to basic math problems are the same in every country in the world. On the other hand, there are multiple strategies to get to those solutions, and it seems like people are still coming up with new ones (much to the chagrin of parents whose kids need help with homework using methods they've never learned).

Math professor Howie Hua shares math strategies that make math easier on social media, and his videos are fascinating. Hua, who teaches math to future elementary school teachers at Fresno State, demonstrates all kinds of mental math tricks that feel like magic when you try them.

For instance, Hua has two videos showing how easy and quick it is to add multidigit numbers left to right instead of right to left, and it's genuinely mind-blowing.


Check out how he explains why adding left to right is "underrated."

OK, seriously. That is way easier to do in your head. It's basically putting the numbers into expanded form and adding them, which makes it easier to visualize.

Adding this way makes sense, but subtracting is a bit more complicated, right?

Wrong, apparently. Watch Hua work his math sorcery subtracting two and three-digit numbers.

@howie_hua

Did you know you can subtract left to right? #math #mathematics #mathtok #maths #teachersoftiktok #teacher #mathtricks #mathtrick

Holy moly. That's faster than the right-to-left, borrow-from-the-next-column method, isn't it? And again, so much easier to visualize what's actually happening, though I don't know if I could fully do this in my head like I could with the left-to-right addition.

Hua recently shared another cool subtraction trick for problems with minuends that have a lot of zeroes. (The minuend is the first number in a subtraction problem. Don't be too impressed. I had to look it up.)

Check this out:

@howie_hua

An underrated subtraction strategy #math #mathematics #mathtok #maths #teachersoftiktok #teacher #mathtricks #mathtrick

So simple, so time-saving and so something I would never have figured out on my own.

These tips and tricks might come in handy for anyone, but they're especially useful for kids who are having to do these kinds of math problems at school all the time. Even if they're supposed to solve the problem with a different strategy, these methods can be a quick way to check their answers.

Anything that makes math easier, I say. You can watch Hua's videos on TikTok, YouTube and Twitter.


This article originally appeared on 10.12.22

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Meet the 18-year-old advocating for teen mental health, one inspiring podcast at a time

All images provided by Prudential Emerging Visionaries

Collins after being selected by Prudential Emerging Visionaries

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A changemaker is anyone who takes creative action to solve an ongoing problem—be it in one’s own community or throughout the world.

And when it comes to creating positive change, enthusiasm and a fresh perspective can hold just as much power as years of experience. That’s why, every year, Prudential Emerging Visionaries celebrates young people for their innovative solutions to financial and societal challenges in their communities.

This national program awards 25 young leaders (ages 14-18) up to $15,000 to devote to their passion projects. Additionally, winners receive a trip to Prudential’s headquarters in Newark, New Jersey, where they receive coaching, skills development, and networking opportunities with mentors to help take their innovative solutions to the next level.

For 18-year-old Sydnie Collins, one of the 2023 winners, this meant being able to take her podcast, “Perfect Timing,” to the next level.

Since 2020, the Maryland-based teen has provided a safe platform that promotes youth positivity by giving young people the space to celebrate their achievements and combat mental health stigmas. The idea came during the height of Covid-19, when Collins recalled social media “becoming a dark space flooded with news,” which greatly affected her own anxiety and depression.

Knowing that she couldn’t be the only one feeling this way, “Perfect Timing” seemed like a valuable way to give back to her community. Over the course of 109 episodes, Collins has interviewed a wide range of guests—from other young influencers to celebrities, from innovators to nonprofit leaders—all to remind Gen Z that “their dreams are tangible.”

That mission statement has since evolved beyond creating inspiring content and has expanded to hosting events and speaking publicly at summits and workshops. One of Collins’ favorite moments so far has been raising $7,000 to take 200 underserved girls to see “The Little Mermaid” on its opening weekend, to “let them know they are enough” and that there’s an “older sister” in their corner.

Of course, as with most new projects, funding for “Perfect Timing” has come entirely out of Collins’ pocket. Thankfully, the funding she earned from being selected as a Prudential Emerging Visionary is going toward upgraded recording equipment, the support of expert producers, and skill-building classes to help her become a better host and public speaker. She’ll even be able to lease an office space that allows for a live audience.

Plus, after meeting with the 24 other Prudential Emerging Visionaries and her Prudential employee coach, who is helping her develop specific action steps to connect with her target audience, Collins has more confidence in a “grander path” for her work.

“I learned that my network could extend to multiple spaces beyond my realm of podcasting and journalism when industry leaders are willing to share their expertise, time, and financial support,” she told Upworthy. “It only takes one person to change, and two people to expand that change.”

Prudential Emerging Visionaries is currently seeking applicants for 2024. Winners may receive up to $15,000 in awards and an all-expenses-paid trip to Prudential’s headquarters with a parent or guardian, as well as ongoing coaching and skills development to grow their projects.

If you or someone you know between the ages of 14 -18 not only displays a bold vision for the future but is taking action to bring that vision to life, click here to learn more. Applications are due by Nov. 2, 2023.
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