Final answer:
To add 14 and 4.2, the sum is 18.2.
Step-by-step explanation:
To add 14 and 4.2, we simply add the whole number part and the decimal part separately.
So, 14 + 4 = 18.
Then, we add the decimal parts, which are the tenths place values.
In this case, 0.2 + 0 = 0.2.
Combining the whole number and decimal parts, we get the final answer of 18.2.