1 cm = 10 mm 1 cm = 1 x 10-2 m solution : 4 cm x ((10 mm) / (1 cm)) cancel out the unit for cm : 4 cm x ((10 mm) / (1 cm) = 40 mm THE ANSWER IS 40 mm
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40 mm 1 cm = 10 mm 1 mm = 0.1 cm
1 cm = 10 mm so 4 cm = 40 mm. Simple!
1 cm = 10 mm ⇒ 4 cm = 4 x 10 mm = 40 mm
4 centimeters=40 millimeters
10 mm = 1 cm 4 mm = (4 / 10) = 0.4 cm = 2/5 of a cm