Math: How to Convert Measurements
5.MD-A
5.MD-A
I can convert like measurement units within the same measurement system.
Distance: U.S. Customary Measurement: 12 inches = 1 foot and 3 feet = 1 yard 1,760 yards = 1 mile (1 mile = 5,280 feet) Metric: 1 meter (m) = 1,000 millimeters (mm), 1 mm = 0.001 m 1 m = 100 centimeters (cm), so 1 cm = 0.01 m 1 m = 10 decimeters (dm), so 1 dm = 0.1 m Longer than a meter: 1 dekameter (dkm) = 10 meters (rarely see this) 1 hectometer (hm) = 100 meters (rarely see this) 1 kilometer (km) = 1,000 meters, so 1 m = 0.001 km Units of Weight and Mass U.S. Customary Measurement: 1 pound (lb) = 16 ounces (oz) 1 ton = 2000 pounds Metric: 1 gram (g) = 1,000 milligrams (mg), so 1 mg = 0.001 g 1 g = 100 centigrams (cm), so 1 cg = 0.01 g 1 g = 10 decigrams (dg) More than a gram: 1 kilogram (km) = 1000 grams |
Liquid
U.S. Customary Measurement: 1 tablespoon (tbsp) = 3 teaspoons (tsp) 1 fluid ounce (fl oz) = 2 tbsp 1 cup = 8 fluid ounces 1 pint = 2 cups 1 quart = 2 pints 1 gallon = 4 quarts Metric: 1 liter (l) = 1,000 milliliters (ml), so 1 ml = 0.001 L 1 L = 100 centiliters (cl), so 1 cg = 0.01 L 1 L = 10 deciliters (dl) More than a liter: 1 kiloliter (kl) = 1,000 liters Time 60 seconds = 1 minute and 60 minutes = 1 hour 24 hours = 1 day 7 days = 1 week 12 months = 1 year 10 years = 1 decade 100 years = 1 century (plural: centuries) 1,000 years = 1 millennium (plural: millennia) How to convert measurements: Going from a smaller measurement to a larger one: Divide the given amount by the conversion value. Example 1: Convert 24 inches to feet. Given Amount = 24 inches There are 12 inches in 1 foot. Conversion Value = 12 inches Divide 24 inches by 12 inches = 2 = 2 feet Example 2: Convert 8 mm to meters Given Amount = 8 mm There are 1000 mm in 1 meter. Conversion Value = 1,000 Divide 8 by 1,000 Since mm are smaller than meters, move the decimal 3 digits left 8 mm = 8.0 mm becomes 0.008 m Going from a larger measurement to a smaller one: Multiply the given amount by the conversion value. Example 1: Convert 2 feet to inches. Given Amount = 2 feet There are 12 inches in 1 foot. Conversion Value = 12 inches Multiply 2 x 12 = 24 = 24 inches Example 2: Convert 3 meters to milometers Given Amount = 3 m There are 1000 mm in 1 meter. Conversion Value = 1,000 Multiply 3 x 1,000 Since meters are larger than millimeters, move the decimal 3 digits right: 3 m = 8.0 m becomes 3,000 mm |