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.

Q: Context: Edward spent $ 16 to buy books and $ 8 to buy pens. Now he has $ 19. 

 Question: How much more did Edward spend on books than pens?

A: 8
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Q: Context: There are 8 different books and 5 different movies in the ' crazy silly school ' series. If you read 19 of the movies and watched 16 of the books 

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

A: 3
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Q: Context: Rachel had to complete 3 pages of math homework and 4 pages of reading homework. 

 Question: How many more pages of reading homework than math homework did she have?

A:
1
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