What is the result of 4.9+0.1-4.9+0.1
4.9+0.1-4.9+0.1的结果是多少
<gadget id="calculator">0.1 - 4.9</gadget>
<output>-4.8</output>

<gadget id="calculator">4.9 + (-4.8) + 0.1</gadget>
<output>0.2</output>

<result>0.2</result>