| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 30 Mar 2008 14:34:05 IST
|
|
|
how do we solve really lenghty calculations.... take for example 128574*73781*736472 in the short time that we have during the entr. exams??
|
Here I am this is ME!!...and there's no where else on earth I'd rather be!!!!!! |
|
|
|
30 Mar 2008 15:20:15 IST
|
|
|
please i could do with some help here...
|
Here I am this is ME!!...and there's no where else on earth I'd rather be!!!!!! |
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
30 Mar 2008 15:36:23 IST
|
|
|
such calculations will not appear in entrance exams....
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
|
|
Use binomial some approximations
I will say this number is 1.3*7.3*7.3*10^14
Now 7.3*7.3 = 7*7 + 2*7*.3 = 53 approx
53*1.3 = 69 so answer is 6.9*10^15
Right answer is 6.986*10^15
|
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
this reply: 7 points
(with 1
in 2 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
30 Mar 2008 17:44:40 IST
|
|
|
they are not testing us for these type of calculations ,but if it appears product will also be there(You can check previous years(2007) JEE paper where 2.303*273*.....=..... was given) and in genral accuracy for 2 decimal places or at most 3 is suff. and for your info i can suggest you learn vedic multiplication it will definetly help you, where you can multiply BIG numbers easily safely and even in limited space) hehe
|
My name is Arnav.
Hoping we'll meet in IIT next year ! |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
30 Mar 2008 18:00:48 IST
|
|
|
there is an excitingly easy method in trachtenbergs speed system of basic mathematics for division,multiplication with speed & accuracy &also finding square roots.it will be really useful if the principles in solving are mastered.vedic mathematics is also preferable.please rate if found useful.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
30 Mar 2008 19:15:59 IST
|
|
|
thanks krishna.gopal....
|
Here I am this is ME!!...and there's no where else on earth I'd rather be!!!!!! |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
