1 mm = 1/1000 of a metre
The milli- prefix means 1/1000
→ 1 mm = 1/1000 m
→ 1 m = 1000 × 1/1000 m = 1000 mm
→ 1mm/1m = (1 mm)/(1000 mm) = 1/1000
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1mm = 1 millimetre = 1/1,000 metre = 1/10 centimetre so first m = milli second m = metre
1/10
1 metre.
1 mm^2 = 10^-6 = 0.000001 metre^2.
Seeing as there are 100 mm in a centimetre, there are 1/100.