Across
- 2. A metal used as money
- 3. A stamp used to show something is official
- 7. Act of buying and selling something
- 8. A system of money used in a country
- 9. Small piece of metal used as money
Down
- 1. A shiny oval-shaped shell that was used as money
- 4. To give something and receive something else in return
- 5. Farm animals used for food or trade
- 6. Exchanging goods or services