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1 cm = 10 mm, so 420

4.5 cm equals 45 mm.

42 mm

Q: 4.2 cm equals how many mm?

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47 mm equals 4.7 cm

it 10 mm equals 1 cm then 500 mm equals 50 cm so then 580 mm equals 58 cm so the answer is 58.1 cm

2000 mm = 200 cm

110 mm = 11 cm

77 cm = 770 mm

42

3000 mm

160 cm = 1600 mm

80 cm = 800 mm

1 mm = 0.1 cm 1 cm = 10 mm

1 cm = 10 mm so 0.28 cm = 2.8 mm.

419 mm