find cube of the following 12 , 9/10, -31, 0.5 , -2/3

Answer :

We can find cube of these numbers easily , As  :

Value of

1 )  12³  =  12 $\times$  12 $\times$ 12  = 1728                      ( Ans )

2 )  ${\left(\frac{9}{10}\right)}^3$  =  $\frac{9}{10}$ $\times$  $\frac{9}{10}$ $\times$ $\frac{9}{10}$   = $\frac{\mathbf{729}}{\mathbf{1000}}$  = 0.729   ( Ans )

3 )  ( - 31 )³  =  -31 $\times$  -31 $\times$ - 31   = - 29791           ( Ans )  ( As we know - $\times$ - $\times$ -  = - )

4 )  ( 0.5 )³  =  0.5 $\times$  0.5 $\times$ 0.5   = 0.125               ( Ans ) 

5 )  ${\left(-\frac{2}{3}\right)}^3$  =  $-\frac{2}{3}$ $\times$  $-\frac{2}{3}$ $\times$ $-\frac{2}{3}$   = $-\frac{\mathbf{8}}{\mathbf{27}}$    ( Ans )  ( As we know - $\times$ - $\times$ -  = - )