SOLVED: Using the metric ruler; measure the length of the bolt: Report the length in centimeters with the proper number of digits length of bolt: cm 2 3 MM METRIC
10 mm is the same as... 1 cm. 20 mm is the same as... 2 cm. - ppt download
Math primary 3 measurments
Millimetre - Wikipedia
Argollas Cher M (2 cm diametro + 3 mm grosor) (par)