Hogwarts Express Problem Solving Set

Rounding

6. Harry is very nervous as he walks onto the Quiddich playing field. As he looks around, he quickly estimates that about 2,500 fans fill the stands. What is the difference between the largest and smallest number of fans represented by this estimate?

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Notes:

Solution:

The greatest number that rounds to 2,500 is 2,549.

The least number that rounds to 2,500 is 2,450.

2,549 2,450 = 99

The difference is 99.