There are 10 more girls than boys in the fifth grade. In the physical education standard test, all the boys have reached the standard, while 10% of the girls have not reached the standard. In this way, a total of 180 boys and girls have reached the standard. Ask how many fifth grade students there are.
五年级学生中女生比男生多10人，在体育达标测试中，男生全部达标，而女生有10%未达标，这样男、女生共有180人达标，问五年级学生共有多少人．
<gadget id="calculator">10 + 180</gadget>
<output>190</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 + (9/10)</gadget>
<output>19/10 = around 1.9</output>

<gadget id="calculator">190 / (19/10)</gadget>
<output>100</output>

<gadget id="calculator">100 - 10</gadget>
<output>90</output>

<gadget id="calculator">100 + 90</gadget>
<output>190</output>

<result>190</result>