In the third grade, there are 200 boys and 168 girls going for physical examination, 316 students have completed physical examination, how many students have not yet had physical examination?
三年级有男生200名，女生168名去体检，已经体检完的有316名，还没有体检的学生有多少名？
<gadget id="calculator">168 - 316</gadget>
<output>-148</output>

<gadget id="calculator">200 + (-148)</gadget>
<output>52</output>

<result>52</result>