0.80 cm
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80 cm equals 800 mm.
1 cm = 10 mm80 cm = 800 mm
There are 4 millimeters more in 8.4 cm than 8 cm. This is because 8.4 cm is 84 mm and 8 cm is 80 mm, so the difference is 4 mm.
8 centimeters is equal to 80 millimeters, because there are 10 millimeters in 1 centimeter.
8 cm is 80 mm.Note: there are 10 mm in 1 cm.