Minimum value: 5.050

Numerical rounding cannot be done continuously. Three decimal places are rounded to ten decimal places (one decimal place) to get 5. 1. The first two digits of the original figure are either 5. 1, and the following figures are rounded off. Either it is 5.0, and the following figures are rounded off. Then the maximum number that can be truncated after "1" is 4, and the maximum number after 4 is 9, that is, the maximum 2 digits after "1" is 49 (less than 49 will be truncated); The smallest number that can be carried is 5, and the smallest number after 5 is 0; That is, at least two digits after "0" are 50 (50 ≥ will be rounded off). 5 1 > 50, so it is not the smallest.

Correct answer:

After rounding a three-digit decimal to the tenth place, you get 5. 1. The maximum value of this three-digit decimal is (5. 149) and the minimum value is (5.050).