On a day in twelve parts of a certain place last year, the highest temperature was 12°C (degrees Celsius), and the lowest temperature was -4°C. What is the difference in degrees Celsius between the lowest and highest temperature of the day?
某地去年十二份的一天，最高温度是12℃(摄氏度)，最低温度是-4℃，这一天最低与最高温度相差多少℃．
<gadget id="calculator">12 - (-4)</gadget>
<output>16</output>

<result>16</result>