Errr. No.
275 cm = 2750 mm, because 1 cm = 10mm.
Cm are greater
64 cm is greater than 630 mm which equals 63 cm
90 cm is greater than 9 mm
420 mm is greater than 4.2 cm
64 cm is 1 cm greater than 630 mm
1 meter = 100 cm = 1000 mm there are 10 mm in 1cm so 300 mm = 30 cm. greater
3.4 cm equals 34 mm which is greater than 30 mm
6 cm is greater than 50 mm which equals 5 cm
1 cm = 10 mm 275 mm = 27.5 cm
23.67 cm = 236.7 mm Therefore 237 mm is greater than 23.67 cm
1 cm = 10 mm12 cm = 120 mmSo 12 cm is greater than 98 mm.
201 mm = 20.1 cm So, no, it isn't greater.