'three decimal places' is correct and usable in written English.
You can use it when you are specifying a precise numerical value, such as "The value was 0.567 rounded to three decimal places".
By contrast, UBS calculated the figure to three decimal places and regularly changed its rates.
Last night's audience - to three decimal places - of 2.371 million means there was only 9,000 viewers in it.
(When you work out the percentage score to three decimal places, it was MITT BEATS RICK, 24.551 24.544).
A minimum of three decimal places precision (WGS 1984, ca. 111 m at the Equator) was required.
These days, he says, they can be traded and their prices discovered electronically down to three decimal places.
Frequencies were recorded in kHz to within three decimal places and had sensitivities of 0.040 kHz/°C and −2.740 kHz/cm for temperature and submergence depth, respectively.
"There are scrap armament dealers there who can quote you the international price of metal to three decimal places," he said.
The pain for the Chinese was doubled by the fact their time was equal to Canada's on hundredths of seconds but slightly slower over three decimal places.
The result of a mathematical calculation, for example, need not always be calculated precisely an accuracy of two or three decimal places is often enough.
Because f(16) is 4, it follows that f(17), or √17, is approximately 4.125, the actual value being 4.123 to three decimal places.
In the days before electronic calculators, engineers resorted to a variety of graphical calculation devices, or nomograms, to solve complex engineering problems quickly and with an acceptable degree of accuracy (typically up to three decimal places).
