Math Heads: DO MATH IN YOUR HEAD! - Math Bites with Danica McKellar 

I've always hated math but Danica actually makes it look fun! This woman is terrific, man

Yep, I've never fallen out of love with Winnie Cooper.

You can also do percentages (%) easily _in your head._ For example: Let's say a $70 item you want to buy is 30% off and want to know how much you're going to save. Well, you know 30% is $3 for every $10. And there are seven (7) $10 in $70. So, 7*3=21. Therefore you save $21. Whoo Hoo! Lets try it again. Item is $50 at 20% discount. 2*5=$10 savings.

My neice is having trouble with math in high school & I am going to send links to all of these videos & the web site. Thank you, Danica!

Yeah Nerdist! Hire all the nerdy hot chics and give them their own show. Recipe for success.

I break down math into smaller chunks in my head all the time both because it's easier and because I only ever memorized a select few of my multiplication tables and I kinda forget how to divide properly. I can do more complex math like algebra and calculus I just need a calculator to do the littler bits.

Danica is a 10!

I used to suck at math problems. I couldn't do them in my head. By using your trick, I found it much more easier to do calculations. Thanks. Your a hottie

I really like this show. Most of this stuff I already do in my head, but its great to see some quality math programming.

I wanted to show this to my class but I can't there's a pinup shot in one of the frames! WHY??

Watch it with my son, love it keep up the excellent work

Is the sound off from the video?

Why is the Pi episode private or taken down?! I use it every year in my classroom and it's super helpful. Please make it public again!

thanks so much

I likede it and it gives you a new way at looking at math the only thing that i did not like was that it was going way to fast for my braine to translaten and calculate at the same time to make it stick and i amjust saying this so that they maybe can do something about it but still a great lesson :-D

Wow that was actually really useful information, thank you

Good tips, thanks.

What is 27 by 3?

Is this video only delayed for me? Why is no one talking about this? Is there a fixed version of this?

More Danica because MOAR. Also, good topic.

WOw this really help me

well done!!! totally agree with you!!!

Wow, these are pretty good vids. Keep it up!

This stuff is cool! It's interesting seeing that gal from Wonder Years narrating. I'm not familiar with any roles I've seen her in since then. Good to see a quality put together presentation of mathematics. I am studying to be an elementary education teacher and was randomly looking for videos on math in your head skills. This is a terrific resource. I found myself doing 19x19 in my head while I was using the toilet. I was only one number off. I actually came up with my own formula too. Imagine 15x15 using an area model. Once I figure out 15x15=225 then I can use that information to solve 16x16 and so on... The formula is to add 15+15 +225 or (15x2)+225

It's hard to believe that Danica is 39, she looks 20.

For those interested in how someone could do mental division like the human calculator in the video, it can be done by memorizing decimalization of certain fractions. Take 358 divided by 7. 7 goes into 35 5 times. Goes into 8 1 time with 1 as the remainder. So the answer is 51 and 1/7. If you know that 1/7=0.142857... repeating off hand, then the answer becomes 51.142857... repeating. I'm pretty sure this was his method, given that he only divided by small numbers.

Danica is a 10

I totally subscribe to the Nerdist, guess why! yeap you guessed it right cos of the amazing Danica McKellar Math rocks!!!

This video inspired me! I think I am going to hide all the calculators at work tonight. I want to see people using theirs brains when they update the hourly counts on the control board. Some might say this is mean, but I call it tough love....LOL

It's hard for a person like me because when I do math in my head like for example 43+34 I would visualize the problem in my head instead of doing it the normal way. I heard that 2% of the population does this.

Great!

Thanks

That really helped

Was that Kellie Martin? Love her !

It's okay to use a calculator. Just learn how to do the raw form of the equation then when you have that nailed down use a calculator. Like the guy who made Wolfram said just use the calculator in step B, but do step A and C yourself.

This is a long time ago but I wonder if when trying to get young people into Maths it would be good to talk even a tiny bit about WHY doing maths in your head helps exercise your brain and makes you smarter in other situations. In this video they said two things in making maths in your head possible: 1) Seperate a hard problem into parts where there is an easy bit 2) Do the easy bit first. They could have added maybe 15 seconds by suggesting that this skill, is a skill that helps you be smarter with every difficult problem and so learning this process for solving maths in your head, helps you solve other problems in your head. It can be reading a difficult book, solving a relationship problem, figuring out what career you want, planning an event. Everything benefits from your brain learning how not to get scared of a bit problem because its trained in splitting up hard problems into the "easy bit" vs "hard bit" and then doing easy bits first. I worry when educators use "arguments to authority" which they joked about in this video but to some degree still did it by simply saying "just do it".

She is great Good advice

I do that multiply by 10 and then divide by whatever all the time and other misc tricks. I just thought I had to because I'm dumb.

I love math

Great vid(s) but the sound is out of sync ☹️

I absolutely love that "10" trick! ⭐⭐⭐⭐⭐

Three nineties flashbacks came to mind while watching this... 1) Kellie Martin as the Snarky Woman made me miss her as Becca on "Life Goes On". 2) Scott Flansburg reminded me of "Amazing Discoveries". 3) The title of the video itself reminded me of "Fresh Arithmetic with Professor Sid and Crazy D" on Fox Kids in the network's earlier days.

Dear Math, Please grow up and solve your own problems, I'm tired of solving them for you.

So good

Was the use of pineapples an intentional How I Met Your Mother reference?

I do math a lot in my head. I love math. Still working on some of the easy math in my head. I have a disability with memory. I have ADD.

Whoa, Kellie Martin! Awesome!

I love you Danica Mckellar! I just saw her on Impractical jokers! She is perfect! =) =)

I hadn't realized I subscribed for math tricks I learned to do in elementary school....

my teachers hate when i do math in my head. the number just apperes without me thinking about it.. and when i get the right answer they say i need to show how i got that answer and it just apperes for me but they dont believe me. but im not as fast as the human calculator.. it takes between 1 and 20 seconds for the number appear.

Yeah. try telling your teacher you did it in your head. FAIL. They all tell you 'show your work'. So I got crappy grades until I got to high school because I refused to write everything down. Then as a junior I aced the SAT's. And suddenly everyone STFU.

Why is the sound and film pit of sync?

oh the ten joke. gotta love Nerdist

Just wanted to share my alternate method: when I do basic math in my head (like shopping) instead of multiplying things by 10, I'll just do one or two digits at a time (rounding), then add them and account for the rounding. So for the pineapple example, I would do 2.00 x 6 = 12.00, then .50 x 6 = 3.00. You'd get 15.00. If I was going for exact, I would account for the pennies like she did. Cool vid though, subscribed!

Danica! Quick! Teach us to convolute two functions in our heads :P

My Dad though illiterate is really good at doing Maths in Head especially when its come to basics like Maths for receipt and payments.

damn i wish you had some more math in your head tricks because i been doing those all my life :(

Anyone else think that she and Dr. Mayim Bailik would make a great team?

I came here because of Danica, stayed because of Kellie, and learned math tricks in spite of myself. Curse you, womanly wiles and educational trickiness! :)

Edumacation! It burns,burns! El dolor es increible!

That's actually how i do math in my head.

Simon and Pegg, lol!

We love you Winnie

Lol wtf, I saw the thumbnail and went "Is that Danica McKellar???" And yes, it was.

Love the reference to the pineapple from HIMYM

Can you do a wonder years themed episode??

like the first one wasn't torture enough

Way to go, Danica. That's how you stand up to the rising tide of innumeracy.

audio sync problem, or is it just me?

Huh wt I can't understand math at all but it vital to learned math though

This reminds me of a modern Square One Television, and that's a good thing. Also, there's no way using pineapple for this wasn't deliberate, considering HIMYM.

I do magic mostly math card tricks I made up by myself but some are inspired by you

For 4:15, another easy way is to do 2.5 x 2 = 5. 5 x 3 = 15

I just convert the numbers into physical objects to assist in math calculation. Example: \\\ + \\ = 5. \\ + \\ = 4. \\ x \\\\\ = 10. Got that?

Takeaway tip: if you want my brain to actually retain it's higher functions, don't put Kellie in the vid. My brain did nothing but spin in place real fast and go 'weeeeeeee Kellie' for half an hour which, while fun, was probaly not the exercise you were aiming for.

The cutest math teacher ever

That's one awesome way to teach the kits not to be afraid of math... and a hot way to teach the rest of us... mmm stuff.... hot nerdy beautiful stuff

VAN HALEN: I GOT IT BAD. SOOO BAD. I'M HOT FOR TEACHER.

Winnie!

DAMN IT TRUDY WHAT ABOUT THE PINEAPPLE?

The 2 year old clearly read it like a song that his parent probably made him memorize. Still it's a little funny how they can say it, yet a lot of the population can't.

i love kumail!

Are you guys having trouble with multiplying 11 by a 2 digit number? Well here is a easy way you can do it!,; Let's say we have 89 x 11 we take the number we are multiplying by 11, in this case "89" and we go 8 + 9 witch gives us 17, Now if you end up with a two digit number like 17, put the number on the right in the middle, 879 but -879- is incorrect, so what you do is you take the remaining 1 from 17, and you add 1 to the first number of the answer you got: -8-79 979✔️ That is you answer. But if you get 72 x 11 , 7 + 2 = 9 just put 9 in the middle of 72 witch gives us 792.

i hate math ALOT but this definitelyy helped

that girl with the mobile phone looks like Siri

yeah! that how I do math it just take me 10x longer...

I love math Im going to grade4

The reason this is presented in an eerie children's show format is beyond me. But, yea...Winnie Cooper.

math fresh your mind

kellie martin! ^^

Next episode, differential equations! Please

ugh she's so prettyyy

Sound is off from lips lol

NICE!!! Some Sidestep Here, hmmmm is That Pineapple a Reference from HOW I MET... or i just think too much. Because She (Danica) left that pinapple on teds room.

While I can appreciate math, education, and Danica McKellar, this show seems to be more geared towards a kid audience. I thought the Nerdist channel was for the high school age and older demographic? But hey, I'm sure there's still some kids watching this who will learn something.

MATH IS CHARISMATIC TRUST ME IM FAMOUS i love it

Hey Danica, I don't know what app you have on your Phone--and now that I think about it, it's probably something better than what I have--uh... ...well shoot! and here I was thinking I'd finally found the right audience to brag about how I have my trusty old HP 48GX (emulator) on both my iPhone and iPad :) Sincerely, Mark

Winnie

Winnie Cooper forever! =D I had a huge crush on her when I was a kid. ;-)

Kellie Martin YAY!!