How to subtract in your head Videos

• 1. Counting Back for Subtraction
• 2. Math Magician 101: Day 1
• 3. Multiply Numbers In 90s Or 100s In Your Head - Math Trick
• 4. Show Your Work - A Let It Go Math Parody
• 5. How to Create a Flip Book
• 6. How to Do the Menu Item Mentalism Trick | Table Magic Tricks
• 7. How to do the best card magic trick ever

Counting Back for Subtraction

Math Magician 101: Day 1

Multiply Numbers In 90s Or 100s In Your Head - Math Trick

User Comments

Adrian Szczerbicki commented on 03 Nov 2015

It doesn't work. Try to calculate 97 x 98 with this method. The difference from 100 is 3 and 2. So subtract the therms 97 - 2 = 95. Same as 98 - 3 = 95. Then cross multiply 2 x 3 = 6. The number I get is 956. Now that's not correct. The actual answer is 9506. Good try to fool us.

Đᑌʞᗴ X commented on 18 Nov 2015

+Adrian Szczerbicki Sorry but the factor in 6 is 06 due to the 2 digit numbers formed from cross subtract and cross. multiply. Any single digit number will be 0(#) (EX: 2 = 02).example:96 x 98= 9408 \ /\ /\ \ | | \ 94 |4 x 2 = 8 = 08

Lamont Hudson commented on 31 Jan 2015

Does this work with number that are not close to 100

leftieloosers commented on 08 Oct 2015

+MindYourDecisions How about showing the working for something like 54x64?

leftieloosers commented on 08 Oct 2015

+MindYourDecisions How about showing the working for something like 54x64?

MindYourDecisions commented on 31 Jan 2015

You can do it for any multiple of 10, like 10, 100, 1000, and so on.For example, let's do 7x8. The difference from 10 is 3 and 2. So you can do 7 - 2 = 5 for the first digit and 2x3 = 6 for the second digit to get 56.

Show Your Work - A Let It Go Math Parody

How to Create a Flip Book

User Comments

Musique3579 commented on 24 Sep 2012

Here is how to do it easier which my Grandfather taught me. Use a normal small pad of paper and make the 1st pic on the bottom page, then put the next page on top and you can see through it enough to draw your next animation. When finihed, flip in the rerverse show here, but it is not such a big hassel and is alot of fun to do. :-)

wilbur9111 commented on 01 Dec 2010

No offence this is a really good idea but what I use is postit notes :D u guys can have a go at this it doesn't take as much effort to make because it's pretty much made for you and also you can make it as big or as small as you want :D sorry whoever made this it's just a nit of advice

Exploding Apple750 commented on 09 Aug 2015

No need for index cards: just cut them on normal paper people, congrats, you saved 1.00$ from your wallet, give it to a homeless man! (really, help other people :D)

00ammy00 commented on 24 May 2011

why don't they ever tell you how to do the interesting stuff like how to make slow-mo scenes or really fast scenes or panning? everyone knows how to do this basic shit

SmashTube commented on 16 Apr 2011

@hasnaen1 NO 2 PEOPLE PROBALY SEE THIS AS A WASTE OF PAPER CAUSE THERE ARE ALOT ANIMATION SOFTWARES LIKE PIVOT AND PIXTON UNLESS...Its with u most of the time

LuvibleEntertainment commented on 29 Mar 2011

@shooterboss Not really a waste of paper cuz u can always use the book itself. The pic is only small. I did 1 of them in my science book but a roket lol.

laggattackk commented on 06 Feb 2011

i learned to do this in like the fifth grade and they're teaching some twenty year old looking guy how to do it... wow people just keep getting stupider.

cinda2030 commented on 04 Oct 2011

HOLY CRAP HOLY CRAP HOLY CRAP HOLY CRAP THIS IS THE FIRST VIDEO I HAVE SEEN OF HOWCAST THAT ACCUALLY REPLY'D TO SOME1 HOLY CRAP

Khalid commented on 05 Mar 2013

can not agree more, but what if its worth 5% of total mark of your grade :'( no idea how this will help my career xD

Salien1999 commented on 16 Oct 2010

@000haker Yea, but you can't draw in pivot, some times people use this for like serious animations.

CrazyVidBlog commented on 14 Aug 2011

@agubokwu ist not a waste you can still make notes on the paper becuase uhhh ist a small drawin

69Rukiia commented on 06 Mar 2013

NICE DUDE NICEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Tomek Spawn commented on 17 Sep 2012

0:08 to 0:12 how to you do soo equal the shape and porpotion without looking the layer?

Minecraft N Gaming commented on 12 Jan 2012

@shooterboss well thats a GREAT idea, go make a video about it and leave us alone kk?

iflow gaming commented on 10 Mar 2013

you call this rubbish because u cant even make an artwork like this yourself. jeez

LevelReset commented on 10 Apr 2011

2 people cant do a back/front flip. 2 people cant afford paper for a flip book

tyra256 commented on 26 Nov 2011

this video is kinda too much but did make me laugh at 1:48-1:89 pause there

sam oakes commented on 18 Jun 2013

Guys, forget about the first few steps.. all you need is a sticky note pad.

How to Do the Menu Item Mentalism Trick | Table Magic Tricks

User Comments

shakaama commented on 31 May 2015

what's wrong with this guy's lips? he looks like he's a fish sucking air. or maybe his fat face just sets off his lips.

jolllyroger1 commented on 05 Oct 2015

he's Jewish duh the worst comedians and illusionists

Jose Luis Rodriguez commented on 15 Dec 2014

Not even the guy understand the mathematics! at 3:28 "that's getting a little complicated". Not at all! If you want the bear number 1, add 2, if you want the 2, add 4. Using the multiplication table 2 is not "getting a little complicated".

Zahid Shabir commented on 14 Feb 2015

I learnt this in school a few years back when i was in year 8

Benjamin Hershey commented on 24 Dec 2014

It is if you have the IQ of a frog and are drunk.

how to do the best card magic trick ever