instruction:
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.
question:
John needs $ 2.5 . He has $ 0.75 . How much more money does he need ?
answer:
1.75


question:
At the fair there were 9 people in line for the bumper cars . If 6 of them got tired of waiting and left and 3 more got in line , how many people would be in line ?
answer:
6


question:
There are 46 rulers in the drawer . Tim took 25 rulers from the drawer . How many rulers are now in the drawer ?
answer:

21