The sum of $9.7$ and $1.8$ is $11.5$.

Would you like any additional details or have any questions?

Here are 5 related questions:

1. What is the result of subtracting $1.8$ from $9.7$?
2. What is $9.7 \times 1.8$?
3. What is $11.5$ divided by $1.8$?
4. If you add $9.7$, $1.8$, and $2.3$, what is the result?
5. How do you calculate the average of $9.7$ and $1.8$?

Tip: When adding decimal numbers, it's helpful to align the decimal points to ensure accurate addition.