There are 286 boys and 265 girls in the fourth grade. Among them, 176 students signed up for the long-distance running. How many students did not sign up?
四年级有男生286人，女生265人．其中有176名同学报名参加了长跑，有多少名同学没有报名？
<gadget id="calculator">265 - 176</gadget>
<output>89</output>

<gadget id="calculator">286 + 89</gadget>
<output>375</output>

<result>375</result>