TASK DEFINITION: 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.
PROBLEM: Bobby has 142 books . Kristi has 78 books . How many more books does Bobby have than Kristi ?

SOLUTION: 64

PROBLEM: Sara 's high school played 12 basketball games this year . The team won most of their games . They were defeated during 4 games . How many games did they win ?

SOLUTION: 8

PROBLEM: On Wednesday , Joan spent 4 half - dollars playing pinball . The next day , she spent 14 half - dollars on pinball . What was the total amount Joan spent playing pinball ?

SOLUTION:
9