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In London 2012, the USA won the most medals: 46 Gold, 29 Silver and 29 Bronze. China was second with 38 Gold, 27 Silver and 23 Bronze. How many more medals did the USA win compared to China? 
Overseas Competition->Knowledge Point->Word Problem Modules->Applying Addition and Subtraction
USA won - 104 medals in total\textquotesingle{} China won 88 medals. Difference = 16. 