1. Customary Measure – Mass/Weight The following are customary units for measuring Mass/weight 1 pound (lb)= 16 ounces (oz) 1 ton (T)= 2,000 pounds

2. Mass- Ounce One slice of bread weighs about 1 ounce. The abbreviation for ounce is oz.

3. Mass - Pound A loaf of bread weighs about 1 pound. The abbreviation for pound is lb. 16 ounces equal 1 pound.

4. Mass- Ton A bread truck weighs about 1 ton. The abbreviation for ton is T. 2,000 pounds equal 1 ton.

5. To find an answer that is close to the actual answer by rounding.

6. Approximate Nearly exact; not perfectly accurate or correct: The approximate time was 10 o'clock.

7. Scale A tool used to measure the weight of an object.

8. Balance Scales A set of scales used to compare the measure of weights