Final answer:
The correct answer to the addition problem 9.98 + 0.065 is option B, which is 10.045.
Step-by-step explanation:
The correct answer is option B. To solve the addition problem 9.98 + 0.065, you need to line up the decimal places and add the numbers. When you align the decimals, you get:
9.980
+ 0.065
--------
10.045
Thus, the sum of 9.98 and 0.065 is 10.045. It is important to ensure that all digits are correctly placed according to their place value before performing the addition.