help: 一道数学题

chenzhencaiya

(10的8次方-10的二次方)，然后在除于（10的7次方-10的3次方）大约等于多少？

chenzhencaiya

You can take 10^2 common out from numerator and 10^3 common out from denominator as given below:-
(10^2(10^6-1))/(10^3(10^4-1))

Since number 1 is negligible in comparision to 10^6 and 10^4 hence it can be neglected as given below:-
(10^2(10^6))/(10^3(10^4))
=10^8/10^7
=10
Hence answer should be 10.

i just got it from google, found it quite easy to understand, so share it over here.

sdcar2010

[100*(10^6 - 1)]/[1000*(10^4 - 1)] ~=~ [100*10^6]/[1000*10^4] = 10

Carrie2009

这题是哪的啊？求个大概的整数么？=10？