Solve each application problem by using addition, subtraction, multiplication, or division as needed. See Examples 1-3.
Don Gracey, the Mountain Timesmith, has serviced and repaired 636 clocks this year. He has worked on 272 wall clocks and 308 table clocks. The rest were standing floor clocks. Find the number of floor clocks he worked on this year.
Example 1
Example 2

Example 3

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