You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

Q: When Jake had 1 cat, he needed to serve 0.5 can of cat food each day. Now that Jake has adopted a second cat, he needs to serve a totalof 0.9 can each day. How much extra food is needed to feed thesecond cat?

A: 0.4
****
Q: Kendall is learning to drive, so this weekend she practiced driving 0.2 mile with her mother and another 0.5 mile with her father. How far did Kendall drive in all?

A: 0.7
****
Q: It rained 0.9 inches on Monday. On Tuesday, it rained 0.7 inches lessthan on Monday. How much did it rain on Tuesday?

A:
0.2
****