In a competition, Zhang Hua answered 10 questions. If he answered one question correctly, he would get +10 points, and if he answered one wrong question, he would get -5 points. At the end of the game, Zhang Hua answered 8 questions correctly.
张华在一次比赛中，答题目数10道，若答对一道计+10分，答错一道计-5分，在比赛结束时，张华答对8道，他应该计分是多少．
<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">(-5) * 2</gadget>
<output>-10</output>

<gadget id="calculator">80 + (-10)</gadget>
<output>70</output>

<result>70</result>