Teacher Yang made glass instruments for students participating in the experimental operation skills competition. The glass tube (3/4) m is used for the first time, and (1/5) m is used less than the first time for the second time. How many meters did Teacher Yang use to remove the glass tube twice?
杨老师为参加实验操作技能比赛的同学制作玻璃仪器．第一次用去玻璃管(3/4)m，第二次比第一次少用(1/5)m．杨老师两次一共用去玻璃管多少米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">(3/4) + (11/20)</gadget>
<output>13/10 = around 1.3</output>

<result>13/10 = around 1.3</result>