题目

Flying down a 488-meter-long slide provides plenty of excitement for most people. But for those who like more extreme adventures, Nicaragua offers an even more exciting slide experience. The thought of racing down an active volcano with only a board is enough to get most people hot under the collar. But for thrill-seeking sports fanatics, boarding down a 2,380-foot-high volcano at the speed of 80 km/h is the coolest sport around.Thousands of travelers are heading to the foothills of Nicaragua’s Cerro Negro to take part in the new sporting craze (狂热). Surfers, dressed in protective jump s两个数的差是6.12，如果被减数增加0.6，减数减少0.6，则差是　 　．