Calculate with a reasonable method: |(1/5)-(150/557)|+|(150/557)-(1/2)|-|-(1/2)|
用合理的方法计算：|(1/5)-(150/557)|+|(150/557)-(1/2)|-|-(1/2)|
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>