TASK DEFINITION: You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
PROBLEM: Context: Kelly has 20 nintendo games and 70 sony games. 

 Question: How many nintendo games does she need to give away so that she will have 12 nintendo games left?

SOLUTION: 8

PROBLEM: Context: There were 16 roses and 3 orchids in the vase. Jessica cut some more roses and orchids from her flower garden. There are now 7 orchids and 13 roses in the vase. 

 Question: How many orchids did she cut?

SOLUTION: 4

PROBLEM: Context: Jack received 6 emails and 8 letters in the morning. He then received 2 emails and 7 letters in the afternoon. 

 Question: How many more letters did Jack receive in the morning than in the afternoon?

SOLUTION:
1