There are 375 boys and 298 girls in Guangming Primary School, and 475 students have had their health checks. How many people have not had their health checks?
光明小学男生有375人，女生有298人，已经检查了身体的同学有475人，还有多少人没有检查身体？
<gadget id="calculator">298 - 475</gadget>
<output>-177</output>

<gadget id="calculator">375 + (-177)</gadget>
<output>198</output>

<result>198</result>