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.
634 mm.
6x30cm=180cm 182.88 to be more precise. 1 foot = 30.48 cm.
About 157 cm. 157.48 cm if you want to be precise.
Perimeter of square: 19+19+19+19 = 76 cm
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.
2cm
2.5 cm is more precise.
decimeters * * * * * Actually, 238 cm = 23.8 dm so 238 cm is more precise.
19.2cm 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.
183cm Slightly more precise, 182.88cm.
No.
12 mm is the most precise.
40 dm
These numbers are precise, as they are all close together. If any one of these are accurate, then this group of numbers can be considered precise and accurate.
634 mm.