(2nd issue): Abacus calculation of the Zu Chongzhi (...)

This a 2nd video of the calculation of the Zu Chongzhi approximation of pi 355/113 using an abacus.

The first video was done with an algorithm of calculation similar to the one used when doing divisions by hand.

This time I've done it another way, using the same method used when calculating divisions with a mechanical calculator: as a series of substracts.

This way takes longer but requires less thinking.

Category:

Howto & Style

Tags:

• pi
• calculation
• calculator
• abacus
• algorithm
• zu
• chongzhi

[ultrafreak128]

Vyggy, actually, the abacus can display 5. the one bead above the bar represents 5

[alexandeu]

OR...you could just simply remember 3.1415926...not so hard to do.

[bigtymelsu]

In Indiana, it is illegal for Pi to be anything other than 3.!

[AwesomeSuperSoccer]

Try to do it faster..... That is so easy!!!! But good job

[Drewster100]

ok, really? that is actually a Japanese abacus, not Chinese.

if you can't get on youtube without saying something ignorant and hateful, dont get on youtube period.

[jenn1ifer]

use a calculator u fuckin chinks

[Vyggy]

Must be hard to do that on an abacus... especially if the abacus can only display the quaternary numerical system (thats why the calculation stops at 3 decimals, 3,141 as the abacus cannot show 5). A poem to memorise pi:

how i need a drink, alcoholic in nature. Count the amounts of letters in each word, and you get the correct answer (3.1415926)

[RetroCalculators]

For those of you wondering...

Zu gave an approximation of pi as 355/113, which was correct to six decimals (tho this video stops at 5)