How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 12:36 am
Code: Select all
what do u think?
thought it was pretty interesting.
(sowwie if it's old)
what do u think?
thought it was pretty interesting.(sowwie if it's old)
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How Chinese multiply [Video]
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Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 12:39 am
that's some weird ass shit :O
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 12:55 am
clever 
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 1:08 am
jesus now ill use it to impress my math teacher XD or even ace a math test without a calculator! though trig and that might get a little hard without it.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 1:39 am
that's not how i multiple...
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 1:46 am
there is a trick to doing logs base 10 without calculators too, but oyu have to learn log 1 thorugh log 10 for it 
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 3:28 am
same concept as your regular non-calculator multiplication method, just more graphical rather than staring numbers in the face.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 3:37 am
Crunching numbers isn't math.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 3:41 am
Im glad I have my mini-calculator with me at all times, I never know when i'll need it. *pushes up glasses*
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 4:12 am
CrimsonNuker wrote:Im glad I have my mini-calculator with me at all times, I never know when i'll need it. *pushes up glasses*
need some pocket protectors?
SM-Count wrote:Crunching numbers isn't math.
yes but it could help when you need to times 2 big numbers ya know
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 4:23 am
Handy stuff, but I'll stick to my calculator. Thanks for sharing.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 4:26 am
What happened to
2754
x 320
0000
55080
826200
881280
?????????? I guess I don't see how the other could be easier lol, but I admit, it's interesting.
2754
x 320
0000
55080
826200
881280
?????????? I guess I don't see how the other could be easier lol, but I admit, it's interesting.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 4:39 am
Goobronicus wrote:What happened to
2754
x 320
0000
55080
826200
881280
?????????? I guess I don't see how the other could be easier lol, but I admit, it's interesting.
I like the Chinese way better
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 4:45 am
CrimsonNuker wrote:Goobronicus wrote:What happened to
2754
x 320
0000
55080
826200
881280
?????????? I guess I don't see how the other could be easier lol, but I admit, it's interesting.
I like the Chinese way better
You suck! lol
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 11:20 am
CrimsonNuker wrote:Goobronicus wrote:What happened to
2754
x 320
0000
55080
826200
881280
?????????? I guess I don't see how the other could be easier lol, but I admit, it's interesting.
I like the Chinese way better
Damn Winese and Wapanese kids these days.
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 2:08 pm
trying to draw a series of 9 parallel lines in limited space can be quite difficult. 
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 2:19 pm
Same concept when using your fingers to multiply...only with more "fingers"
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 5:30 pm
inky wrote:Same concept when using your fingers to multiply...only with more "fingers"
lol who multiplies with fingers?
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 6:53 pm
it becomes less handy if you do stuff like 29x29 though, coz a 9 will cross an other 9.
will be lots off dots to count ( with high numbers overall).
Its still pretty nice though, i showed it to my little sister, shes kind of bad at stuff like this so it might actualy help her a bit
will be lots off dots to count ( with high numbers overall).
Its still pretty nice though, i showed it to my little sister, shes kind of bad at stuff like this so it might actualy help her a bit
Re: How Chinese multiply [Video]
Posted: Fri Jul 31, 2009 6:59 pm
+1Thomas42 wrote:Handy stuff, but I'll stick to my calculator. Thanks for sharing.
Re: How Chinese multiply [Video]
Posted: Sat Aug 01, 2009 11:09 pm
god I really suck at math...
cuz I don't understand shit of it even after those two examples...
I'll just use the old method of
1234
5678
_____×
15412
I have no idea if that's correct. look at how my math sucks. it's a miracle I can count to 10.
cuz I don't understand shit of it even after those two examples...
I'll just use the old method of
1234
5678
_____×
15412
I have no idea if that's correct. look at how my math sucks. it's a miracle I can count to 10.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 5:21 pm
Thee_UniQue wrote:inky wrote:Same concept when using your fingers to multiply...only with more "fingers"
lol who multiplies with fingers?
I don't use any finger tricks myself, but I was taught an interesting one for multiplying by 9 (at least for small numbers). I don't know if this at all relates to the OP in this thread because the video is blocked for me.
Hold up 10 fingers. Mentally number them left-to-right 1-10. Whatever number you're multiplying by 9, lower that finger. The rest of the fingers give you the answer.
Ex: 9x5: Put up 10 fingers, lower your left thumb. You have 4 fingers raised on left hand, 5 on right. 9x5=45.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 5:48 pm
Icealya wrote:god I really suck at math...
cuz I don't understand shit of it even after those two examples...
I'll just use the old method of
1234
5678
_____×
15412
I have no idea if that's correct. it's a miracle I can count to 10.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 5:51 pm
i don't think my girlfriend multiplies like that. she just does it all in her head. she puts me to shame and i use math on a regular basis at work 
besides everyone has a cellphone and they prob have a calculator app on them. no one really needs to know math anymore.
besides everyone has a cellphone and they prob have a calculator app on them. no one really needs to know math anymore.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 6:11 pm
Wouldnt that suck if it was 189 x 789
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 7:01 pm
Ryoko wrote:Wouldnt that suck if it was 189 x 789
189 * 789 = x
(180 + 9) * (780 + 9) = x
3(60 + 3) * 3(260 + 3) = x
3(3(20 + 1)) * 3((65 * 4) + 3) = x
3(3(21)) * 3(((13 * 5) * 4) + 3) = x
3(3(3(7))) * 3((((12 + 1) * 5) * 4) + 3) = x
3(3(3(6 + 1))) * 3(((((3 * 4) + 1) * 5) * 4) + 3) = x
27(6 + 1) * 3((((3 * 4) + 1) * 20) + 3) = x
(162 + 27) * 3(((20(3 * 4) + (1*20))) + 3) = x
189 * 3((20 * 3 * 4) + 20) + 3) = x
189 * 3(240 + 20) + 3) = x
189 * 3(260 + 3) = x
189 * (780 + 9) = x
189 * 789 = x
And OBVIOUSLY 189 * 789 = 149,121. No wonder it takes me so long to do math!
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 10:42 pm
PR0METHEUS wrote:Ryoko wrote:Wouldnt that suck if it was 189 x 789
189 * 789 = x
(180 + 9) * (780 + 9) = x
3(60 + 3) * 3(260 + 3) = x
3(3(20 + 1)) * 3((65 * 4) + 3) = x
3(3(21)) * 3(((13 * 5) * 4) + 3) = x
3(3(3(7))) * 3((((12 + 1) * 5) * 4) + 3) = x
3(3(3(6 + 1))) * 3(((((3 * 4) + 1) * 5) * 4) + 3) = x
27(6 + 1) * 3((((3 * 4) + 1) * 20) + 3) = x
(162 + 27) * 3(((20(3 * 4) + (1*20))) + 3) = x
189 * 3((20 * 3 * 4) + 20) + 3) = x
189 * 3(240 + 20) + 3) = x
189 * 3(260 + 3) = x
189 * (780 + 9) = x
189 * 789 = x
And OBVIOUSLY 189 * 789 = 149,121. No wonder it takes me so long to do math!
say wut??
Srsly, I hate math now even more.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 10:52 pm
PR0METHEUS wrote:Thee_UniQue wrote:inky wrote:Same concept when using your fingers to multiply...only with more "fingers"
lol who multiplies with fingers?
I don't use any finger tricks myself, but I was taught an interesting one for multiplying by 9 (at least for small numbers). I don't know if this at all relates to the OP in this thread because the video is blocked for me.
Hold up 10 fingers. Mentally number them left-to-right 1-10. Whatever number you're multiplying by 9, lower that finger. The rest of the fingers give you the answer.
Ex: 9x5: Put up 10 fingers, lower your left thumb. You have 4 fingers raised on left hand, 5 on right. 9x5=45.
The trick we were learned was a lot easier. You add one number with 1 and you deduct the other with 1 as well.
18 -> 27
1+1=2
8-1=7
2+1=3
7-1=6
etc etc
Or at least I think it's easier.
A bit OT but is there a word describing these kind of tricks? In Dutch we call them 'Ezelsbruggetjes', literally translated: 'donkey bridges'.
Re: How Chinese multiply [Video]
Posted: Mon Aug 03, 2009 11:04 pm
woutR wrote:A bit OT but is there a word describing these kind of tricks? In Dutch we call them 'Ezelsbruggetjes', literally translated: 'donkey bridges'.
Short cuts