Calculate the following questions with a simple method: 100+99-98+97-96+95-94+...-6+5-4+3-2.
用简便方法计算下面的题目：100+99-98+97-96+95-94+…-6+5-4+3-2．
<gadget id="calculator">16 * 9</gadget>
<output>144</output>

<gadget id="calculator">144 - 3</gadget>
<output>141</output>

<result>141</result>