Carolina has 10 marbles. One half of them are blue. How many of Carolina's marbles are blue?

10 * 1/2 = ?

10

To find out how many of Carolina's marbles are blue, we need to calculate half of the total number of marbles she has.

Step 1: Determine half of the total number of marbles.
Half of 10 marbles is calculated as 10 / 2 = 5.

Therefore, Carolina has 5 blue marbles.