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There are 10 millimetres in one centimetre. Therefore, 3.1 centimetres is equal to 3.1 x 10 = 31 millimetres.

Milli meter (mm)

Centi meter (cm)

Deci meter (dm)

Meter (m)

Deca meter (dam) <- this one is rarely used

hecto meter (hm) <- this one also not a lot

Kilo meter (km)

1.000.000 mm

=

100.000 cm

=

10.000 dm

=

1.000 m

=

100 dam

=

10 hm

=

1 km

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12y ago

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