Which of the following would not round to 1.2 when rounded to the nearest tenth?
A.1.149 B.1.209 C.1.22 D.1.18
The correct answer and explanation is:
The correct answer is A. 1.149.
When rounding a number to the nearest tenth, you need to look at the digit in the hundredths place (the second decimal). If this digit is 5 or greater, the digit in the tenths place is rounded up by 1. If it is less than 5, the tenths place stays the same.
Let’s go through each option:
- A. 1.149: The digit in the hundredths place is 4, which is less than 5. Therefore, the tenths place remains unchanged, and 1.149 rounds to 1.1, not 1.2.
- B. 1.209: The digit in the hundredths place is 0, which is less than 5. The tenths place remains unchanged, and 1.209 rounds to 1.2.
- C. 1.22: The digit in the hundredths place is 2, which is less than 5. Therefore, the tenths place remains unchanged, and 1.22 rounds to 1.2.
- D. 1.18: The digit in the hundredths place is 8, which is greater than 5. Thus, the tenths place is rounded up by 1, and 1.18 rounds to 1.2.
In conclusion, the only number that does not round to 1.2 is 1.149, as it rounds to 1.1 instead.