What does 259 mm round to in cm?

To convert from millimeters to centimeters, you divide by 10 since there are 10 millimeters in a centimeter. Therefore, 259 mm is equivalent to 25.9 cm. When rounding to the nearest centimeter, you look at the digit in the tenths place, which is 9 in this case. Since 9 is equal to or greater than 5, you round up to the nearest whole number, resulting in 26 cm.