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.

[EX Q]: Craig walked 0.2 mile from school to David 's house and 0.7 mile from David 's house to his own house . How many miles did Craig walk in all ?
[EX A]: 0.9

[EX Q]: Robin was making baggies of cookies with 6 cookies in each bag . If she had 23 chocolate chip cookies and 25 oatmeal cookies , how many baggies could she make ?
[EX A]: 8

[EX Q]: Sarah had some trucks . She gave 13 to Jeff , and now she has 38 trucks left . How many trucks did Sarah have to start with ?
[EX A]:
51