22.5 rounded to the nearest tenth
The Correct Answer and Explanation is:
Correct Answer: 22.5
To round 22.5 to the nearest tenth, we must understand the place value of each digit in the number. The tenth place is the first digit to the right of the decimal point. In the number 22.5:
- The digit 2 is in the tens place.
- The next 2 is in the ones place.
- The digit 5 is in the tenths place.
The goal is to round the number so that it remains accurate to only one digit after the decimal point. However, when the digit in the hundredths place is available, we must check it to decide whether to round up or keep the tenths digit the same. In this case, 22.5 has no visible hundredths digit, which means it is 0 by default.
When rounding to the nearest tenth, we look at the hundredths place to decide. If the digit in the hundredths place is 5 or more, we round the tenths digit up by 1. If the digit is less than 5, we keep the tenths digit the same.
In our example, 22.5 does not have a hundredths digit after the 5, which means we do not need to round the 5. The 5 is already in the tenths place and there is no digit after it that affects rounding. Therefore, the number is already in its rounded form.
Additionally, 22.5 is exactly halfway between 22.4 and 22.6, which makes it a special case. When rounding a number that ends in .5, the standard rule is to round up, which confirms that 22.5 stays as it is.
So, 22.5 rounded to the nearest tenth is 22.5 because it already ends in the tenths place with no digits needing further rounding.
