The numbers below are in order from greatest to least.

7.358 7.240 6.864 6.500 6.382
Which number would best fill the blank space?
A.6.510
B.6.499
C.6.359
D.6.240
B?

Where is the blank space?

Between 6.500 and 6.482

Yes. B. is right.

To find the best number to fill the blank space, you need to look for the number that is just slightly smaller than 6.382 since the number should be in descending order.

Looking at the given options:
A. 6.510 is larger than 6.382, so it cannot be the correct answer.
B. 6.499 is smaller than 6.382, so it cannot be the correct answer.
C. 6.359 is smaller than 6.382, so it cannot be the correct answer.
D. 6.240 is smaller than 6.382, which means it could be the correct answer.

Therefore, D. 6.240 is the best number to fill the blank space as it is the closest number that is smaller than 6.382.