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數軸上到原點的距離小於2的整數有-1,0,1,故x=3,數軸上到原點的距離不大於2的整數有-2,-1,0,1,2,故y=5,數軸上到原點的距離等於2的整數有-2,2,故z=2,∴x+y+z=3+5+2=10.
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