Decimal Comparison: Finding the Largest Value of 0.5

To determine the correct answer, let's first add 0 to our number as follows:

$0.5=0.50$

Let's look at the answers:

0.55 - Since the hundredths digit is 5 and 5 is greater than 0, this is the correct answer.

0.5 - If we add 0 and compare 0.50 to 0.50, since both numbers are equal, this is not the correct answer.

0.42 - Since the tenths digit is 4 and 4 is less than 5, this is not the correct answer

0.499 - If we add another 0 to our number and compare 0.499 to 0.500, since the tenths digit is 4 and 4 is less than 5, this is not the correct answer.