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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 millimeters
  • 40 millimeters - 10 millimeters = 30 millimeters. (3cm)
  • 10 millimeters = 1 centimeter
  • 4 centimeters - 1 centimeter = 3 centimeters (30 mm)
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What is 15 centimeters minus 58 millimeters?

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