There are 235 students in the fourth grade, which is 45 more than that in the third grade. What is the correct formula for finding the number of students in the third grade
四年级有学生235人，比三年级多45人，求三年级有多少人的正确列式是多少
<gadget id="calculator">235 - 45</gadget>
<output>190</output>

<result>190</result>