Final answer:
To write an American phone number with a country code, include the country code +1 at the beginning of the phone number.
Step-by-step explanation:
To write an American phone number with a country code, you will need to include the country code at the beginning of the phone number. The country code for the United States is +1. Here's an example of how to write an American phone number with the country code:
+1-XXX-XXX-XXXX
Replace XXX-XXX-XXXX with the specific phone number.