Xiaohua spent (1/3) an hour doing Chinese homework, which was (1/15) more hours than doing math homework. How many hours did it take her to complete both assignments? What is the correct column
小华做语文作业用了(1/3)小时，比做数学作业多用(1/15)小时．她做完这两种作业一共用了多少小时？正确的列式是多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/3) - (1/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(1/3) + (4/15)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>