instruction:
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.
question:
Context: Mary is baking a cake. The recipe calls for 3 cups of sugar 10 cups of flour and 15 cups of salt. She already put in 6 cups of flour. 

 Question: How many more cups of flour does she need to add?
answer:
4


question:
Context: 5 red peaches and 11 green peaches are in the basket. 

 Question: How many more green peaches than red peaches are in the basket?
answer:
6


question:
Context: There are 10 different books and 11 different movies in the ' crazy silly school ' series. If you read 13 of the books and watched 12 of the movies 

 Question: How many more books than movies have you read?
answer:

1