The length of a pencil is 13 cm rounded to the nearest whole cm. Which of the following is the smallest possible real length of the pencil?

Question

Quizplus · Accepted Answer

Rounding is when we make a number "simpler" but keep the value as close to the original number as possible. To round a number:
Determine which digit or place (value) is the number you want to "round to." All numbers after this (to the right) will become zeroes after rounding.
Keep it the same number if the next number (the number to its right) is less than 5. Then, change all other numbers to the right to 0. For example, 132 rounded to the nearest ten would be 130. (132 is closer to 130 than it is to 140.)
Increase the number by 1 if the next number (the number to its right) is 5 or more. Then, change all other numbers to the right to 0. For example, 158 rounded to the nearest hundred would be 200. (158 is closer to 200 than it is to 100.)
12.49 is the smallest answer choice, but 12.49 rounded to the nearest whole number is 12.
12.49 → 12
The next smallest answer choice is 12.5. 12.5 rounded to the nearest whole number is 13, making it the correct answer choice.
12.5 → 13
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The Length of a Pencil Is 13 Cm Rounded to the Nearest