In the third grade, 26 students were selected to participate in the extracurricular activities organized by the school. All of them won prizes. Among them, 19 people won prizes in the rope skipping competition, and 17 people won prizes in the speech contest. How many students participated in both the rope skipping contest and the speech contest? award.
三年级选出26名同学参加学校组织的课外活动，所有人都获了奖，其中19人在跳绳比赛中获奖，17人在演讲比赛中获奖，有多少名同学在跳绳比赛和演讲比赛中同时获奖．
<gadget id="calculator">17 - 26</gadget>
<output>-9</output>

<gadget id="calculator">19 + (-9)</gadget>
<output>10</output>

<result>10</result>