# How do you write 865*10^-7 in standard notation?

Jan 30, 2018

British standard notation: $8.65 \times {10}^{-} 5$

Standard notation: $0.0000865$

#### Explanation:

If you mean scientific notation, which is standard form in Britain, the number would be:

$8.65 \times {10}^{-} 5$.

The decimal was moved two places to the left, so the exponent is increased by $2$, such that $2 + \left(- 7\right) = - 5$.

If you mean standard form in which the number is expanded so that there is no exponent, the number would be:

$0.0000865$

The exponent $- 7$ means to expand the number by moving the decimal to the left $7$ places.