# Math Help - how to find cube of1.015 using shortcuts and without calci

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

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

2. Hello, Supreeth!

How to find cube of1.015 using shortcuts and without calci
I'd do it like this . . .

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

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

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

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

3. ## oh thank u. tat was really helpful

thx.. its really is a short easier method

4. There are other methods, too, if you're interested.

5. ## i asked to kno bout findin cubes, not cube roots

i asked for cubes not cube roots