Question

Round 0.721 to the nearest hundredth.

Answer 1

Answer:

0.72

Step-by-step explanation:

The second digit to the right of the decimal is the hundredths place.  We look at the thousandths place to determine how to round.  5 or above round up.  Since it is a 1 we leave it alone

.721 rounds to .72

Answer 2

Answer:

0.72

Step-by-step explanation:

First, note that 0.721 has two parts. The integer part to the left of the decimal point and the fractional part to the right of the decimal point:

Integer Part: 0

Fractional Part: 721

To round 0.721 to the nearest hundredth means to round the numbers so you only have two digits in the fractional part.

We use the following rules to round 0.721 to the nearest hundredth:

A) If the last digit in the fractional part of 0.721 is less than 5, then simply remove the last the digit of the fractional part.

B) If the last digit in the fractional part of 0.721 is 5 or more and the second digit in the fractional part is less than 9, then add 1 to the second digit of the fractional part and remove the third digit.

C) If the last digit in the fractional part of 0.721 is 5 or more and the second digit in the fractional part is 9, and the first digit in the fractional part is less than 9, then add 1 to the first digit in fractional part and make the second digit in fractional part 0. Then remove the third digit.

D) If the last digit in the fractional part of 0.721 is 5 or more and the second digit in the fractional part is 9, and the first digit in the fractional part is 9, then add 1 to the integer part and make the fractional part.

With 0.721, rule A applies and 0.721 rounded to the nearest hundredth is: 0.72.  Hope it helps! :)