how to find cube of1.015 using shortcuts and without calci

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- Apr 13th 2009, 10:50 PMSupreethhow to find cube of1.015 using shortcuts and without calci
how to find cube of1.015 using shortcuts and without calci

- Apr 14th 2009, 06:12 AMSoroban
Hello, Supreeth!

Quote:

How to find cube of1.015 using shortcuts and without calci

$\displaystyle \left(1 + \frac{15}{10^3}\right)^3 \;=\;1^3 + 3(1^2)\left(\frac{15}{10^3}\right) + 3(1)\left(\frac{15}{10^3}\right)^2 + \left(\frac{15}{10^3}\right)^3 $

. . . . . . . .$\displaystyle = \;1 + \frac{45}{10^3} + \frac{675}{10^6} + \frac{3375}{10^9} $

. . . . . . . .$\displaystyle = \;1 + 0.045 + 0.000675 + 0.000003375$

. . . . . . . .$\displaystyle = \;1.045678375$

- Apr 14th 2009, 09:12 AMSupreethoh thank u. tat was really helpful
thx.. its really is a short easier method

- Apr 15th 2009, 05:27 AMstapel
There are

**other methods**, too, if you're interested. (Wink) - Apr 15th 2009, 06:04 AMSupreethi asked to kno bout findin cubes, not cube roots
i asked for cubes not cube roots

- Apr 15th 2009, 06:19 AMstapel
Sorry; I misread your post. (Blush)