Starting from Junjunjia, going east is positive, and going west is negative. If Junjun walked +50 meters away from home, and then walked -50 meters, how many meters is the distance between Junjun and his home?
以军军家为起点，向东走为正，向西走为负．如果军军从家走了+50米，又走了-50米，这时军军离家的距离是多少米．
<gadget id="calculator">50 + (-50)</gadget>
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