Anthony estimated the following problem:

Question

15,296 + 28,281
He rounded to the ten thousands place. His estimate was 40,000. Did he underestimate or overestimate? Explain.

Answer 1

15296 =~ 20,000
28281 =~ 30,000

On the other hand, the exact sum is 43,577, which rounds to 40,000

I'd say he underestimated.

Answer 2

The number has 5 digits
It is evenly divisible by 100
The value of one of the digits is 6,00