# How do you write 0.000189 in scientific notation?

Jun 21, 2015

$1.89 \times {10}^{-} 4$

#### Explanation:

Take the decimal point and move it to the right until you pass the first non-zero digit (in this case number $1$) stop there and get rid of the zeros.
Count the movements of the point and use this value as NEGATIVE power of $10$ that you'll use as a multiplicator.
You get:
$1.89$ and 4 movements of the point.
so you get: $1.89 \times {10}^{-} 4$

Remember if you move the point to the right the exponent of $10$ will be negative (as in this case). If you move it to the left it will be positive.
Ex. $1 , 890 , 000 = 1.89 \times {10}^{6}$