1. the standard unit in measuring distance is a meter 2. the appropriate tool to measure the length and width of your bedroom is a ruler 3. 1 km is equal to 1000 meters therefore 2 km is equal to 2000 meters 4. the appropriate unit in a par distance is the decimeter 5. 1,000 mm is equal to 1 meter therefore 5,000 mm is equal to 3 meters