One addend is (3/20), and the other addend is less than this addend (1/20), what is the sum of these two addends?
一个加数是(3/20)，另一个加数比这个加数少(1/20)，这两个加数的和是多少？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/20) - (1/20)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/20) + (1/10)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>