1 cm = 10 mm 2 cm = 20 mm . . 10 cm = 100 mm . . 15 cm = 150 mm
Neither is necessarily more precise; something could be exactly 19mm or exactly 2cm. However it can definitely be said that measuring to the nearest mm is more precise than measuring to the nearest cm. This is because a mm is smaller and so if any rounding is involved (to the nearest mm or cm) then the rounding is less of a distance and the error in absolute precision is therefore less.
80 cm equals 800 mm.
20 mm 1 cm = 10 mm 1 mm = 0.1 cm
10 mm = 1 cm so 545 mm = 545/10 = 54.5 cm. Simple! 10 mm = 1 cm so 545 mm = 545/10 = 54.5 cm. Simple! 10 mm = 1 cm so 545 mm = 545/10 = 54.5 cm. Simple! 10 mm = 1 cm so 545 mm = 545/10 = 54.5 cm. Simple!
It is 0 cm.
40
64 cm
1 cm is equal to 10 mm, so 3 cm is equal to 30 mm
115
3.4cm is equal to 34mm.
1 cm = 10 mm so exactly 100 mm
1 cm = 10 mm 8 cm = 80 mm 80 cm = 800 mm 86 cm = 860 mm 86.3 cm = 863 mm 86.36 cm = 863.6 mm
1 cm = 10 mm 2 cm = 20 mm . . . 9 cm = 90 mm 10 cm = 100 mm 20 cm = 200 mm 30 cm = 300 mm
1 cm = 10 mm → 3.5 cm = 3.5 × 10 mm = 35 mm
1 cm = 10 mm 2 cm = 20 mm . . 10 cm = 100 mm . . 15 cm = 150 mm
10 mm = 1 cm 20 mm = 2 cm 200 mm = 20 cm 240 mm = 24 cm 244 mm = 24.4 cm