In the school's 4th Mathematics Festival, 75 students in the sixth grade participated in the school's primary mathematician selection activity, which was more than the number of fifth graders (1/4). How many students in the fifth and sixth grades participated in the primary mathematics home selection activities?
在学校第四届数学节活动中，六年级有75位同学参加了学校小数学家评选活动，比五年级参加的人数多了(1/4)，五、六年级共有多少位同学参加小数学家评选活动？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">75 / (5/4)</gadget>
<output>60</output>

<gadget id="calculator">60 + 75</gadget>
<output>135</output>

<result>135</result>