If Lingli lends half of her pocket money, she will have 10 yuan left. So, she made a mistake of 8 yuan, how many yuan will be left.
如果玲丽把零花钱借出一半，还余下10元．那么，她错出8元，还会剩下多少元．
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<result>12</result>