Approximate the smallest decimal fraction that can be formed using the digits 8, 5, 6, and 9 to the nearest thousandth.
To write the smallest decimal fraction, put the decimal point (0.), then write the digits arranged in ascending order from the left to the right. So the smallest decimal fraction formed using the digits 8, 5, 6, and 9 is 0.5689.
To approximate to the nearest thousandth, look at the digit in the ten thousandths place. 9 is equal to 5 or more, so increase the digit in the thousandths place by 1 and leave out the other digits to the right.