The grasshopper and the frog had a jumping contest. The frog jumped 39 inches and the grasshopper jumped 17 inches. How much farther did the frog jump than the grasshopper?
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The frog jumped 39 inches. 
The grasshopper jumped 17 inches. 

To find out how much farther the frog jumped, we need to subtract the grasshopper's jump from the frog's jump. 

39 inches - 17 inches = 

22 inches