You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Annie has 6 apples . She gets 6 more from Nathan . Later , Annie buys 10 crayons at the store . How many apples does Annie have in all ?
12

John had 33 socks . If he threw away 19 old ones that did n't fit and bought 13 new ones , how many socks would he have ?
27

Karen added 0.25 cup of walnuts to a batch of trail mix . Later , she added 0.25 cup of almonds . How many cups of nuts did Karen put in the trail mix in all ?

0.5