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.

Q: In fourth grade there were 35 students at the start of the year . During the year 10 students left and 10 new students came to school . How many students were in fourth grade at the end ?

A: 35
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Q: Pamela bought 9.8 ounces of sugar , and she spilled 5.2 ounces of it on the floor . How much is ?

A: 4.6
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Q: There are 43 pencils in the drawer and 19 pencils on the desk . Dan placed 16 pencils on the desk . How many pencils are now there in total ?

A:
78
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