2cm
19 mm is more precise than 2 cm because it is a smaller unit of measurement. There are 10 mm in 1 cm, so 19 mm is more specific than 2 cm.
2.5 cm is more precise.
19.2cm is more precise
634 mm.
19mm is more precise. 19mm = 1.9cm
Usually in cm or inches.
decimeters * * * * * Actually, 238 cm = 23.8 dm so 238 cm is more precise.
82 mm is more precise because you are missing 0.2 for 8 cm. If you want your number in cm then 8.2 cm is just as precise as 82 mm.
88 cm - 69 cm equals 19 cm. This calculation simply subtracts the smaller measurement from the larger one, resulting in a difference of 19 centimeters.
a mm is a tenth of a cm. This makes it a thousanth of a metre. It is a small and precise unit of measurement.
The difference is in the precision. 3 cm is assumed to be closer to 3 cm than to 2 or 4 cm. 3.00 cm is assumed to be closer to 3.00 cm than to 2.99 or 3.01 centimeters. Hence, the second measurement is possibly 100 times more precise.
cm most likely if you want to be precise. but meters if you are making an estimate.