Oh, dude, 20mm is like 2cm. So, if you're measuring something and you're like, "Oh, this is 20mm," just divide by 10 and you'll get the answer. Easy peasy!
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20 millimeters is 2 centimeters.
Since 1cm = 10mm, then there are 2cm's in 20mm's
one fifth 10mm = 1cm 2mm = 0.2cm
1 cm is = to 10 mm X= 20.3 mm You multiply 20.3X1 and divide by 10. So X=2.03 cm 20.3 mm=2.03 cm
2 m = 200 cm 1 meter = 100 centimeters 1 centimeter = 0.01 meter