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.

Sara had 4 quarters and 8 dimes in her bank. Her sister borrowed 4dimes. How many dimes does Sara have now?
4.0

Fred has 10 red balloons, Sam has 46 red balloons, and Dan has 16red balloons. The balloons cost 10 dollars. How many red balloonsdo they have in all?
72.0

Dan had 7 potatoes and 4 cantelopes in the garden. The rabbits ate 4of the potatoes. How many potatoes does Dan now have?

3.0