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∵點A與原點0的距離為3,∴點A表示的數是±3,∵點A、B間的距離為1,∴點B表示的數是3+1=4,3-1=2,或-3+1=-2,-3-1=-4,所以,點B所對應的數為±4,±2.故答案為:±4,±2.
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