Sheet # 32/Inventions

Name: _____________________ Date_____________

A decade is a period of 10 years

A century is a period of 100 years

A millennium is a period of 1000 years

You have lived about a decade. Very few people have lived for a century.

Use the table and your knowledge of place value to answer the questions

1. The sewing machine was invented 3 years later than the match. When was the sewing machine invented?



2. The adding machine was invented 2 centuries earlier than the bicycle. When was the adding machine invented?



3. The match was invented 6 decades before the gasoline auto. When was the gasoline auto invented?



4. The piano was invented 10 decades after the telescope. Give the year in which the piano was invented.



5. Leonardo Da Vinci learned about flight by watching birds. He drew a picture of an airplane about 400 years before the airplane was invented. In what year did Da Vinci draw the picture?



6. The first modern naval submarine was built about 10 centuries after sailors invented the magnetic compass. About when was the first naval submarine built?



7. What will be the date one millennium after the invention of the thermometer?