Final answer:
The child's chronological age on 2/25/2015 would be 3 years and 6 months, calculated by comparing the test date to the child's birthdate and taking into account the difference in years, months, and days.
Step-by-step explanation:
To calculate the child's chronological age on the test date of 2/25/2015, when the child's birthdate is 8/24/2011, we need to subtract the birthdate from the test date. First, we look at the years: 2015 - 2011 = 4 years. Then, we compare the months and days. February is the 2nd month, and August is the 8th, so we have to go back 6 months. However, since the day in February (25th) is after the birthdate in August (24th), we don't need to subtract another month.
Thus, the child's age on 2/25/2015 is 3 years and 6 months.
To find the child's chronological age, subtract the birthdate from the test date. In this case, the test date is 2/25/2015 and the child's birthdate is 8/24/2011.
First, find the difference in years: 2015 - 2011 = 4 years.
Then, find the difference in months: 2 - 8 = -6 months. Since the result is negative, borrow a year from the years difference and add 12 months: 4 - 1 = 3 years, 12 - 6 = 6 months.
Therefore, the child's chronological age is 3 years and 6 months.