Answer:
24.0
Explanation:
When you are rounding, you either round up or round down. It depends on the digit that is to the right of the digit you are rounding to.
To round 23.983 to one decimal place (the bolded 9), it depends on the digit one over to the right (the underlined 8). When rounding to one decimal place, you only keep one decimal place.
Cut off the 83 => 23.9
If the underlined digit is 5 or greater, then you round up. (Increase the bolded digit by one).
If the underlined digit is 4 or less, then you round down. (Keep the bolded digit the same).
Since the underlined digit, 8, is "5 or greater", you round up. If you increase the bolded digit by one, you have to carry it to the next digit like in addition.
. 23.9
+ 0.1
. 24.0
23.983 rounded to one decimal place is 24.0