A football is 45 yuan, a volleyball is 55 yuan, Mr. Wang brought 150 yuan, how much should I get back for buying a football and a volleyball? (Answer in two ways.)
一个足球45元，一个排球55元，王老师带了150元，买一个足球和一个排球应找回多少元？(用两种方法解答．)
<gadget id="calculator">150 - 45 - 55</gadget>
<output>50</output>

<result>50</result>