Simple calculation: (5/9)-(3/8)+(11/18)-(5/8).
简算：(5/9)-(3/8)+(11/18)-(5/8)．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/9) - (3/8)</gadget>
<output>13/72 = around 0.180556</output>

<gadget id="calculator">11 / 18</gadget>
<output>11/18 = around 0.611111</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(11/18) - (5/8)</gadget>
<output>-1/72 = around -0.013889</output>

<gadget id="calculator">(13/72) + (-1/72)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>