Xiao Ming went to Qinglong Mall to buy a basketball and spent 49.8 yuan, and bought a football for 48.2 yuan. He paid the cashier 100 yuan, how much should he get back?
小明去青龙商场买一个篮球花了49.8元，又买了一个足球花了48.2元，他付给收银员100元，应该找回多少元？
<gadget id="calculator">49.8 + 48.2</gadget>
<output>98</output>

<gadget id="calculator">100 - 98</gadget>
<output>2</output>

<result>2</result>