Measurements( Week 14 Practice) 2. There are ounces, pounds and tons used in the U.S. customary weight system. | 1 pound (lb.) = 16 ounces (oz.) | | 1 ton (t.) = 2000 pounds | How many ounces are in 2 pounds? 3. Inches, feet, yards, and miles are used in the U.S. customary length system. | 1 foot (ft.) = 12 inches (in.) | | 1 yard (yd.) = 3 feet | | 1 mile (mi.) = 1760 yards | How many inches are in 9 feets? 5. There are millimeters, centimeters, meters and kilometers in the Metric length system. | 1 centimeter (cm.) = 10 millimeters (mm.) | | 1 meter (m.) = 100 centimeters | | 1 kilometer (km.) = 1000 meters | How many millimeters are there in 7 meters and 2.3 centimeters? |