After adding parentheses to the calculation formula, the operation sequence is: division→subtraction→addition: 5+7/0.5-2.4.
给算式添上括号的后使运算顺序为：除→减→加：5+7/0.5-2.4．
<gadget id="calculator">7 / 0.5</gadget>
<output>14</output>

<gadget id="calculator">14 - 2.4</gadget>
<output>11.6</output>

<gadget id="calculator">5 + 11.6</gadget>
<output>16.6</output>

<result>16.6</result>