4 cm = _____ mm, 400 mm, 40 mm, 14 mm, 10 cm 6mm = ______ mm, 106 mm, 60mm, 1006 mm, 6 cm  3 mm =______ mm, 60 mm, 603 mm, 63 mm, 23 cm 4mm = ______ cm, 23 cm, 23.4 cm, 204 cm, 12.4 cm = _____ mm, 12 cm, 12.4 mm, 124 mm, 77mm = _____ cm, 7 cm 7 mm, 77 cm, All are wrong.

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