What is the sum of the difference between (3/10) and (1/5) plus (7/12)?
(3/10)与(1/5)的差加上(7/12)，和是多少？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(3/10) - (1/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(1/10) + (7/12)</gadget>
<output>41/60 = around 0.683333</output>

<result>41/60 = around 0.683333</result>