There are 550 black and white TV sets in the shopping mall, which is 150 less than the color TV sets. How many color TV sets are there? What is the correct column
商场里有黑白电视机550台，比彩色电视机少150台．彩色电视机有多少台？列式正确的是多少
<gadget id="calculator">550 + 150</gadget>
<output>700</output>

<result>700</result>