instruction:
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.
question:
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?
answer:
0.4


question:
Kendra made punch for her friend's birthday party. She used 0.25 gallon of grape juice, 0.35 gallon of cranberry juice, and 0.2 gallon of club soda. How many gallons of punch did Kendra make?
answer:
0.8


question:
There are 34 dogwood trees currently in the park. Park workers willplant 49 dogwood trees today. How many dogwood trees will thepark have when the workers are finished?
answer:

83.0