Answer:
30
Explanation:
because the number after 23 is greater than 5 .
Answer:
2390
Explanation:
Since they are asking for the nearest tens, you should focus on the ones. If it is 5 and above, it rounds up to the next tens. If it is 4 and below, it rounds to the least nearest ones of the tens (I don't really know how to explain the round down)