Maple elementary has 183 school days each year. What is 183 rounded to the nearest ten?

To round to the nearest ten, you look at the term in the ones place, if it is less than 5 you keep the tens place and round the ones place down to zero, otherwise you round up the tens place and make the ones place equal to zero ...

In this case the ones place is 3, which is less than 5, so you keep the tens place, 8, and round the ones place down to 0, leaving you with

180

183 rounded to the nearest 10 is 180