On New Year's Day in 2011, the highest temperature in Xi'an is 5°C, and the lowest is -3°C. What is the temperature difference in Xi'an on this day?
2011年元旦西安市的最高气温是5℃，最低气温是-3℃，西安市这天的温差是多少．
<gadget id="calculator">5 - (-3)</gadget>
<output>8</output>

<result>8</result>