0.000008−0.00000008=____ ×10^−6

Answer 1

To solve the expression \(0.000008 - 0.00000008\) and express the result in the form \( __ \times 10^{-6}\):

1. First, we write both numbers with the same exponent:

   \[ 0.000008 = 8 \times 10^{-6} \] \[ 0.00000008 = 0.08 \times 10^{-6} \]

2. Now we can perform the subtraction:

   \[ 0.000008 - 0.00000008 = (8 \times 10^{-6}) - (0.08 \times 10^{-6}) \] \[ = (8 - 0.08) \times 10^{-6} \]

   Calculating \(8 - 0.08\):

   \[ 8 - 0.08 = 7.92 \]

3. Therefore:

   \[ 0.000008 - 0.00000008 = 7.92 \times 10^{-6} \]

So, the answer is:

\[ \boxed{7.92} \]