Xiaoping spent (1/2) hour on Chinese homework, and (1/4) hour less on math homework than Chinese homework. How many hours did he spend on these two homeworks?
小萍做语文作业用了(1/2)小时，做数学作业比语文作业少用(1/4)小时，他做这两种作业一共用了多少小时？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) + (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>