1 cm = 10 mm
⇒ 3 cm = 3 x 10 mm
= 30 mm
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It is: 30mm = 3cm
In order to subtract, we need all units to be equal. We can either convert centimeters to millimeters or millimeters to centimeters.4 centimeters = 40 millimeters40 millimeters - 10 millimeters = 30 millimeters. (3cm)10 millimeters = 1 centimeter4 centimeters - 1 centimeter = 3 centimeters (30 mm)
32
one inch