Final answer:
To add 2.8 and 7.2, you line up the decimal points and add the numbers.
Step-by-step explanation:
To add 2.8 and 7.2 together, you line up the decimal points and add the numbers as you would any other addition problem. In this case, 8 + 2 equals 10. So the sum of 2.8 and 7.2 is 10.
Learn more about Adding decimals