Math. . How 'elicit, numbers in aii: Mill I illegit THIS"?! I Blir FE: Elf .. I tried to do this with 8284=? and I was just like 100-82= ... 100-82= ... 100-82=... 100-82= ... I think I am what is wrong with the American educational syste math tumblr
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Comments(263):

[ 263 comments ]
What do you think? Give us your opinion. Anonymous comments allowed.
User avatar #68 - kimkve (07/04/2013) [-]
Please do 47*63....

100-47 = 53
100-63 = 37

53+37 = 90
53*37 = **** !
#96 to #68 - anon (07/04/2013) [-]
well you can do
47*6=282
282*10=2820 this is equal to 47*60 now we just have to add the 3 other times remaining.
47*3=141+2820=2961

Or jus put it in the calculator. Either is fine with me
User avatar #104 to #68 - drulludanni (07/04/2013) [-]
what i would do is change it to 50*60 = 3000
then + 3* 50 to get 60 to 63 again so its 50*63=3150 and then - 3* 63 to change 50 to 47 which equals 2961. It might not be the easiest way but it works and is faster than the conventional way in most cases and its what i use most of the time when multiplying in the head.
User avatar #147 to #68 - lmaopwnt (07/04/2013) [-]
You could just do 53x40 (2,120) then just subtract 159 (53x3) from that.
That would give you 1,961. and 100-90 is 10, so your answer would be 2,961.
#193 to #147 - psychrophile (07/04/2013) [-]
If you're going to go through that extra work, why not just multiply 96x100 and subtract (3x96 = 288)?
User avatar #150 to #147 - davidavidson (07/04/2013) [-]
can't do that in your head tho m8.
User avatar #155 to #150 - lmaopwnt (07/04/2013) [-]
I did do it in my head, although I guess I forgot that i'm one of few that can.
#160 to #155 - davidavidson (07/04/2013) [-]
You are just so smart. When are they making that movie about your smartness again?
#165 to #160 - lmaopwnt (07/04/2013) [-]
Excuse me for trying to help someone, if you don't like not being able to do math then stop playing the dumbass and learn to do it yourself like I did. People overestimate the difficulty of math all the time, once you stop being intimidated by it and get the hang of it it's just as easy as doing it on paper.
Excuse me for trying to help someone, if you don't like not being able to do math then stop playing the dumbass and learn to do it yourself like I did. People overestimate the difficulty of math all the time, once you stop being intimidated by it and get the hang of it it's just as easy as doing it on paper.
#168 to #165 - davidavidson (07/04/2013) [-]
I'm just giving you **** . I can do it do.

Take it easy tuffins
#236 to #68 - anon (07/05/2013) [-]
When you multiply large numbers, always multiply by the number closest to 10 or 5 as possible, in your situation I would say to myself

37 x 100 = 3700
3700 / 2 = 1850 (which is the same as 37 x 50)
37 x 3 = 111
1850 + 111 = 1961
#40 - romdadon (07/04/2013) [-]
what if the numbers are greater than a hundred
User avatar #127 to #40 - jokerja ONLINE (07/04/2013) [-]
Use a nearby calculator or asian
#54 to #40 - grandterskrasao (07/04/2013) [-]
subtract from 1000...
#67 to #54 - anon (07/04/2013) [-]
But what about numbers less than a hundred but greater than 1000...? You can't explain that.
#137 to #67 - grandterskrasao (07/04/2013) [-]
less... than a hundred.. but greater than 1000? ... wut? I know i haven't had too advanced math, my highest being half a class of trig, but im pretty sure there is no such number.
#148 to #137 - nickypickle (07/04/2013) [-]
I'm pretty sure he was just making a joke.
I'm pretty sure he was just making a joke.
#21 - flyleafistheshit (07/04/2013) [-]
I tried to do this with 82*84=? and I was just like 100-82= ...
100-82= ...

100-82=...

100-82= ...

I think I am what is wrong with the American educational system.
User avatar #62 to #21 - bagguhsleep (07/04/2013) [-]
It'd be easier to just separate the equation into (82*80)+(82*4).
User avatar #75 to #62 - psykobear (07/04/2013) [-]
Take it even further:
(82*8)*10 + (82*4)
Further:
((80*8)+(2*8))*10 + (80*4)+(2*4)
FURTHER:
(((8*8)*10)+(2*8))*10 + ((8*4)*10)+(2*4)
Now just start at the innermost parenthesis and work outward:
((64*10) + 16)*10 + 32*10 + 8
(640 + 16)*10 + 320 + 8
6560 + 320 + 8
6880 + 8
6888
82 * 84 = 6888
#207 to #75 - anon (07/04/2013) [-]
and you can do that in your head can you?
User avatar #238 to #207 - psykobear (07/05/2013) [-]
Well, yes, but I skip a few steps. I was trying to be thorough in my explanation, since this content only applies to a few instances.
#93 to #21 - anon (07/04/2013) [-]
I call it "Captcha Syndrome"
User avatar #208 to #21 - ponieskilledmyacc (07/04/2013) [-]
I got stuck at 18x16... this method isn't that easier..
#244 to #208 - thumbsupforyou (07/05/2013) [-]
18*16=10*(18+6)+8*6=240+48=288
Works for all numbers between 10 and 20, just notice that you have to subtract 10 after adding the numbers (or just not adding the 10 at all like I did)

Too bad I have no idea how to make 100-82 easier in any way
User avatar #245 to #244 - ponieskilledmyacc (07/05/2013) [-]
I usually just do 100-90+10-2
#44 to #21 - anon (07/04/2013) [-]
So... and now, whats 16x18?
#213 to #44 - anon (07/04/2013) [-]
288
User avatar #41 to #21 - mrhotwings (07/04/2013) [-]
I always have trouble with these type of problems until I thought of doing this.
Problem: 100-82
Remove the two from 82: 100-80=20
Bring in the two: 20-2=18
100-82=18
I seriously hoped this helped, I am rather bad when it comes to explaining things.
P.S. I said the word problem so many times, it doesn't even sound like a word anymore....
#231 to #41 - anon (07/05/2013) [-]
I think of it as 82 + 8 = 90
90 + 10 = 100

answer is 18
User avatar #149 to #41 - tabarzins (07/04/2013) [-]
I always did it like this:
start : 100-82
Subtract 2 from 10: 10 - 2 = 8
Subtract 8+1 from 10: 10 - 9 = 1
put em together and 18
#45 to #41 - anon (07/04/2013) [-]
***************************************************'**************************** ***********************'***************************************************'**** ***********************************************'******************************** *******************'***************************************************'******** *******************************************'************************************ ***************'***************************************************'************ ***************************************'**************************************** ***********'***************************************************'**************** ***********************************'******************************************** *******'***************************************************'******************** *******************************'************************************************ ***'***************************************************'************************ ****************************************
User avatar #46 to #45 - mrhotwings (07/04/2013) [-]
Um.... thanks?
#203 - rel (07/04/2013) [-]
Guys I think I broke it
#232 to #203 - anon (07/05/2013) [-]
In this case the 96 would carry over and cancel with the -96, so it still works. It just doesn't make the computation any faster...
#237 to #203 - Alchemyst (07/05/2013) [-]
That's because the right side of the equation should read = 100*(100-(x+y)) + (100-x)*(100-y) .
#220 to #203 - yearofthemonkey (07/04/2013) [-]
Well there is your answer
#37 to #35 - anon (07/04/2013) [-]
9312!
3 times 3 = 9
3
1 + 2 = 3
User avatar #70 to #37 - snowshark (07/04/2013) [-]
333... the number of the beast...
#163 to #35 - deandrummer (07/04/2013) [-]
Last Guardian confirmed
#219 to #35 - nymikemet (07/04/2013) [-]
Just in case you didn't see it
#125 - blackrunner ONLINE (07/04/2013) [-]
MS paint you know.
#224 to #125 - silverlance (07/05/2013) [-]
This is the worst thing I've seen all day all week all my life
+1
#199 to #125 - hinedodmansmith **User deleted account** has deleted their comment [-]
#218 to #199 - clockworkphysicist (07/04/2013) [-]
Why are you here?
#87 - flipz (07/04/2013) [-]
but why is the teacher a terrorist? gif unrelated
but why is the teacher a terrorist? gif unrelated
#90 to #87 - anon (07/04/2013) [-]
Comment #66
#97 to #87 - kingoflulzfool (07/04/2013) [-]
cause they are 			*******		 geniuses , and the whole reason they fight the system
cause they are ******* geniuses , and the whole reason they fight the system
#226 to #97 - anon (07/05/2013) [-]
yeah like the multiple system
#18 - thumbsupforyou (07/04/2013) [-]
The method I use for numbers lower or higher than that is also pretty easy, even if it looks a bit complicated before you try it yourself:
Let's try 147*221:

210
------
147
221

The last digit of every number matches the 0, the second one from the right matches the 1, and so on, increasing by 1 the further you go to the left
Now you multiply all numbers possible with a summed up indicator of 0 (in this case it's only the last digits of both numbers as only 0+0=0) and add the results. In this case it's just 7*1=7 which is the last digit of the result. Now you do the same thing for every number up to 4 (as the highest digit of both numbers has an indicator of 2 and 2+2=4):
xxxx7 (result until now)
next digit: 4*1+7*2=18 (indicators 1+0=1 and 0+1=1)
write down the 8, remember the 1:
xxx87, +1 remembered
next digit: 1+1*1+4*2+7*2=24 (remainder of the last result, 2+0=2, 1+1=2, 0+2=2)
xx487, +2 remembered
next one: 2+1*2+4*2=12 (remainder, 2+1=3, 1+2=3)
x2487, +1 remembered
last one: 1+1*2=3 (remainder, 2+2=4)
Result: 32487

Sorry for my bad english, this made it look far more complicated than it had to be
User avatar #107 to #18 - drulludanni (07/04/2013) [-]
what i would do is change it to 150*220=3*50*220=3*11000=33000
then you add 150 so it is 150*221= 33150 then you subtract 3*221 so it is
147*221=33150 - 663 = 32487
#215 to #107 - thumbsupforyou (07/04/2013) [-]
Of course this method is a lot faster and easier in special cases, I also use it myself sometimes, but if the numbers get higher and less convenient (for example something like 678*724) it would be easier to use the way I explained as you have to remember far less numbers.
Calculating this my way would only require to remember the numbers themselves, the current result (up to 5 digits) and the remainder of the last calculation, so at no point would you have to remember any more than 12 digits (which is very useful if you can't write anything down).
The case I used to explain this method was only chosen like that so the numbers stay small and the calculation easy to comprehend.
User avatar #217 to #215 - drulludanni (07/04/2013) [-]
yeah my method is mostly effective in the double digit range and soem easy cases of 3 digits.
#76 - Girondins (07/04/2013) [-]
1*1 =

99+99 = 198
99*99 = 9801

1*1 = 1989801
User avatar #78 to #76 - psykobear (07/04/2013) [-]
Check out comment #77. I got a better (be it long) explanation.
#130 to #76 - anon (07/04/2013) [-]
it says how to multiply large numbers, 1 isnt quite a large number if your on a scale of 1 to 100
#71 - sweetellie ONLINE (07/04/2013) [-]
Everyone's discussing maths and I'm just sat here being excited that Bernard Black/Dylan Moran is on the front page.
Everyone's discussing maths and I'm just sat here being excited that Bernard Black/Dylan Moran is on the front page.
#115 to #71 - noodleofrassilon (07/04/2013) [-]
I want him as the 12th Doctor, really bad
#246 to #115 - sweetellie ONLINE (07/05/2013) [-]
...That would be awful. I'm sure Dylan has better things to do than be in doctor who.
...That would be awful. I'm sure Dylan has better things to do than be in doctor who.
#247 to #246 - noodleofrassilon (07/05/2013) [-]
He's a talented comedy actor, and so was Jon Pertwee. But seriously why the jab at Doctor Who?
User avatar #248 to #247 - sweetellie ONLINE (07/06/2013) [-]
Not everyone likes doctor who, you know. honestly, I used to be OBSESSED with it but I got bored of it when I was 11. I don't get the sudden jolt in it's popularity, because now I don't even get why I like it. And I've been left with a ******* cyberman helmet, remote control dalek and a ******** of stickers I got out of magazines all over my room.
#250 to #248 - noodleofrassilon (07/07/2013) [-]
It's good
User avatar #251 to #250 - sweetellie ONLINE (07/07/2013) [-]
It doesn't deserve the praise it gets. At all.
#252 to #251 - noodleofrassilon (07/07/2013) [-]
It's emotional, funny, with good writing, and a great universe with tons of history.   
People enjoy not just the show itself but the experience of "Doctor Who" and all the history it has with it.   
It's great family entertainment, I encourage you to watch another episode, maybeThe Eleventh Hour or The Doctor's Wife   
Why do you have to be so negative about it though?   You could just say " I don't like it "  you don't have to act like everyone else's opinion on it is invalid.
It's emotional, funny, with good writing, and a great universe with tons of history.
People enjoy not just the show itself but the experience of "Doctor Who" and all the history it has with it.
It's great family entertainment, I encourage you to watch another episode, maybeThe Eleventh Hour or The Doctor's Wife
Why do you have to be so negative about it though? You could just say " I don't like it " you don't have to act like everyone else's opinion on it is invalid.
User avatar #253 to #252 - sweetellie ONLINE (07/07/2013) [-]
lol, I am not watching any more doctor who. Like, I said I got ******* bored of it.
I'm not acting like your opinion is invalid. I get that people like it, but I don't... Get over it?
#254 to #253 - noodleofrassilon (07/07/2013) [-]
" It doesn't deserve the praise it gets. At all. "

"The general positive opinion that has been arising of it recently is invalid "

And I' absolutely sure you'll see a difference between how you saw it when you were 11 and how you see it now, most shows are completely different experiences when you rewatch them after puberty.
User avatar #255 to #254 - sweetellie ONLINE (07/07/2013) [-]
Whatever. I don't care.
BTW, Your precious doctor who won't receive such a backlash if you don't shove it down people's throats.

And now I'm done with this silly argument.
#256 to #255 - noodleofrassilon (07/07/2013) [-]
Actually read the discussion here
I suggested that Dylan Moran, being a talented actor, would be a great choice for the show to make. You decided to insinuate that any other use of his time would be better, and then went forward to insult Doctor Who, I politely disagreed, and you further retaliated with negative language about it.
I wasn't shoving it down your throat, yes I brought it up but I only really talked about the show when you decided to say it would be a waste of someone's time to even be involved.

User avatar #257 to #256 - sweetellie ONLINE (07/07/2013) [-]
Yeah, I still don't care. You're beginning to try my patience.
#258 to #257 - noodleofrassilon (07/07/2013) [-]
I am not concerned with the patience of someone who continually says rude things and insults things I enjoy. I don't care that you don't like it, neither does my best friend, I just get mad that you're being a dick about it
User avatar #259 to #258 - sweetellie ONLINE (07/07/2013) [-]
Why do you even care? People say bad stuff about things I like and I don't get all angry and argue about it. There's nothing wrong with people having their own opinions or thinking bad things about a TV PROGRAM. Just because it's doctor who, that doesn't make it in any way above criticism.
#260 to #259 - noodleofrassilon (07/07/2013) [-]
You make good points, and yes I completely agree.
But that's not what you did.
User avatar #261 to #260 - sweetellie ONLINE (07/07/2013) [-]
How many times do I have to tell you that I don't care? >.>
#262 to #261 - noodleofrassilon (07/07/2013) [-]
I'unno 2 or 3 more times should do it.
I'unno 2 or 3 more times should do it.
#263 to #262 - sweetellie ONLINE (07/07/2013) [-]
Well in any case, this is the last time I'm going to reply.    
Well done in your trying to convert me into a whovian. You've done a stellar job.
Well in any case, this is the last time I'm going to reply.
Well done in your trying to convert me into a whovian. You've done a stellar job.
#264 to #263 - noodleofrassilon (07/07/2013) [-]
I've converted near 40 lost souls, 15 of them over the internet.   
41 can come another day.   
But I really wasn't even trying, because you obviously didn't want to. The only reason I recommended an episode was so that you could watch it and be like " Oh, that's why I used to like it, okay, that's why people like it *shrug*" and go about your daily life with a little less contempt for those who like it.
I've converted near 40 lost souls, 15 of them over the internet.
41 can come another day.
But I really wasn't even trying, because you obviously didn't want to. The only reason I recommended an episode was so that you could watch it and be like " Oh, that's why I used to like it, okay, that's why people like it *shrug*" and go about your daily life with a little less contempt for those who like it.
#100 - jammingjam (07/04/2013) [-]
I've always done it like this. Let's say 60*35
60*30= 1800
60*5=300
1800+300=2100
I know this is an easy example but it's helpful when you have scratch paper.
User avatar #221 - masterspectre (07/04/2013) [-]
I thought it was going to equal 911.
#210 - gongthehawkeye (07/04/2013) [-]
Mfw it worked
Mfw it worked
#16 - mrparkinglot (07/04/2013) [-]
or you could... I don't know..... USE A CALCULATOR?   
   
   
I mean... they are everywhere now, on your phone, your computer on your.. yeah calculator
or you could... I don't know..... USE A CALCULATOR?


I mean... they are everywhere now, on your phone, your computer on your.. yeah calculator
User avatar #20 to #16 - zakaizer (07/04/2013) [-]
Non-calculator exams? Where they expect you to do **** like this, I mean yeah, it's not that hard, just time consuming, using that method, you've got more time to tackle the harder **** in the paper.
User avatar #23 to #20 - mrparkinglot (07/04/2013) [-]
You've got a point. I didn't think about that
#24 to #23 - zakaizer (07/04/2013) [-]
'salright, I forgive you
#25 to #24 - mrparkinglot (07/04/2013) [-]
People here does that??
People here does that??
#26 to #25 - zakaizer (07/04/2013) [-]
Eh, sometimes, depends on how bad a mood I'm in, luckily, I'm pretty happy right now
Eh, sometimes, depends on how bad a mood I'm in, luckily, I'm pretty happy right now
User avatar #110 to #20 - lizardnigger (07/04/2013) [-]
We could do that Japanese grid **** too
User avatar #113 to #110 - zakaizer (07/04/2013) [-]
Aye, that works, I just find that one above easier to remember, plus I get confused counting lines, they always screw with my eyes....
User avatar #114 to #113 - lizardnigger (07/04/2013) [-]
But in a non calculator exam...
Also, the grid method works
User avatar #116 to #114 - zakaizer (07/04/2013) [-]
But that takes ages to draw out, that minute or so you save could be vital
User avatar #117 to #116 - lizardnigger (07/04/2013) [-]
Meh, well, I'm a nerd and I usually have 20 minutes left for every hour
User avatar #118 to #117 - zakaizer (07/04/2013) [-]
I'm predicted A*, but I highly doubt I'm going to get it, I think I'd be lucky to get an A, and I'm that twat who never stops looking at his paper, always meticulously going through it
User avatar #119 to #118 - lizardnigger (07/04/2013) [-]
I got an A in my last maths exam
My teacher says I can get an A* so I did it again and tbh I'm expecting one
I check my exam, then sit there and do nothing and then steal water at the end of the exam
User avatar #120 to #119 - zakaizer (07/04/2013) [-]
Well, I hope you get the marks, man, sucks to go through it again just to not improve
#121 to #120 - lizardnigger (07/04/2013) [-]
thankyou     
the same for you and have a gif
thankyou
the same for you and have a gif
User avatar #6 - hounding (07/04/2013) [-]
useless for anything less than 80*80ish because you would end up multiplying double digits anyway
ex: 78*75
22+25=
22*25=

why have i wasted 15 minutes of my life on this ._.
User avatar #8 to #6 - Jwako (07/04/2013) [-]
but you can just do it again with the new numbers
User avatar #9 to #8 - hounding (07/04/2013) [-]
ok
22*25
78+75=
78*75= ummmm we were trying to solve that in the first place >.>

i actually had no idea that it would repeat until i did this
User avatar #10 to #9 - Jwako (07/04/2013) [-]
oh **** i feel stupid now. 22*25 is easier than 78*75 tho
User avatar #13 to #6 - Shramin (07/04/2013) [-]
22+25 = 47, 22 x 25 = ]22 x 10]+[22x10]+[22x5] = 220 + 220 + 110 = 550, Total is 47550?

at any rate that is how I solve math in my head, I simplify the Times sequence by cutting it into pieces.
User avatar #14 to #13 - Shramin (07/04/2013) [-]
at any rate the answer is wrong due to being 5850, unless .. 4700 + 550 = 5250... Nope still wrong.
#65 to #6 - anon (07/04/2013) [-]
78 x 75

1. 100-78=22, 100-75=25
2. 22+25=47, 100-47=53
NOW: 5 will be your first digit. Save the 3 for later.
3. 22 x 25=550
NOW: Take the 3 from the last step, and add it to the first digit of this answer. Stick your first digit from earlier (5) in front.
4. 78 x 75= 5850
BItch.
User avatar #242 to #65 - hounding (07/05/2013) [-]
And now for how normal people do math in their head
78*75
78*70 =546(0)
78*5=390

5460+390=5850
But then again I am half asian...
User avatar #202 - wittypotato (07/04/2013) [-]
The numbers Mason, what do they mean?
#204 - theturtletrolley (07/04/2013) [-]
1.97 x 96
2
User avatar #196 - Pestilence (07/04/2013) [-]
If the fine people of Funnyjunk would rather not have a terrorist teaching them:

www.youtube.com/watch?v=7F0xtQ66dcg

By the way, it's called base 100 multiplication.

There is a base 50 version too:

www.youtube.com/watch?v=E2Az_6gH74w
#183 - blacklightsun (07/04/2013) [-]
But apparently the method if flawed as show by numbas in comment #144
But apparently the method if flawed as show by numbas in comment #144
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