Xiao Ming took 8.5 yuan to buy school supplies. He bought a notebook for 2.6 yuan and a pair of triangle boards for 3.4 yuan. How much money does Xiao Ming have left?
小明带了8.5元钱去买学习用品．他买了一个笔记本2.6元，一副三角板3.4元，小明还剩多少钱？
<gadget id="calculator">2.6 + 3.4</gadget>
<output>6</output>

<gadget id="calculator">8.5 - 6</gadget>
<output>2.5</output>

<result>2.5</result>