4508 is about (4500) and 9996 is about (10000).

6 198 is about (6200), and 8 103 is about (8 100).

16 12 is about (1600), and 6095 is about (6 100).

597 is about (600), and 898 is about (900).

The approximate value of a number depends on the requirements of the topic: if it is a whole ten, it depends on the number of digits. Use "rounding method" to enter one of five digits to ten digits, and discard it if it is four digits or less; If it's a whole hundred, look at the ten digits after the hundred. When the decimal number reaches 5, they will add one to a hundred. If less than or equal to 4, they will be discarded. ...