Japanese Multiplication

Skybird · 07-15-12, 06:08 PM

That video is probably by a German and so he did not comment in language but points with the pencil so that it becomes clear what it is about.

The principle is as as simple as it is stu7nning. Multiplication without needing to do according math in your head!

With German explanation, the same stuff:

mapuc · 07-15-12, 07:03 PM

Amazingly, it is probably something I would show my niece. It is probably the simplest way to multiply in

Markus

TorpX · 07-17-12, 01:48 AM

Interesting, but I think it's easier to do it in the usual way when you get into three digit numbers.

TarJak · 07-17-12, 02:05 AM

Although it probably works with numbers larger than 3, the time and effort of drawing up to 9 lines for each digit wouldn't make it worth using for 999x998 for example.

Pretty neat trick for smaller digits though.

Penguin · 07-18-12, 12:15 PM

quite interesting!

For people who have problems with the "traditional" multiplication, there is also the Indian method:
The vid's in German only, but as math is an universal language, it should be self-explanatory.

07-15-12, 06:08 PM	#1
Skybird Soaring Join Date: Sep 2001 Location: the mental asylum named Germany Posts: 42,602 Downloads: 10 Uploads: 0	Japanese Multiplication That video is probably by a German and so he did not comment in language but points with the pencil so that it becomes clear what it is about. The principle is as as simple as it is stu7nning. Multiplication without needing to do according math in your head! With German explanation, the same stuff: __________________ If you feel nuts, consult an expert.

07-15-12, 07:03 PM	#2
mapuc CINC Pacific Fleet Join Date: Sep 2003 Location: Denmark Posts: 20,535 Downloads: 37 Uploads: 0	Amazingly, it is probably something I would show my niece. It is probably the simplest way to multiply in Markus __________________ My little lovely female cat

07-17-12, 01:48 AM	#3
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	Interesting, but I think it's easier to do it in the usual way when you get into three digit numbers.

07-17-12, 02:05 AM	#4
TarJak Fleet Admiral Join Date: Jul 2006 Location: Sydney, Australia Posts: 17,052 Downloads: 150 Uploads: 8	Although it probably works with numbers larger than 3, the time and effort of drawing up to 9 lines for each digit wouldn't make it worth using for 999x998 for example. Pretty neat trick for smaller digits though.

07-18-12, 12:15 PM	#5
Penguin Ocean Warrior Join Date: Mar 2010 Location: Rheinische Republik Posts: 3,322 Downloads: 92 Uploads: 0	quite interesting! For people who have problems with the "traditional" multiplication, there is also the Indian method: The vid's in German only, but as math is an universal language, it should be self-explanatory.