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用数字0.1.2.3.4组成不同的三位数能组成几个?(数字可以重复)请把具体的三位数写出来.
人气:330 ℃ 时间:2019-12-13 11:10:50
解答
100个100,101,102,103,104,110,111,112,113,114,120,121,122,123,124,130,131,132,133,134,140,141,142,143,144 200,201,202,203,204,210,211,212,213,214,220,221,222,223,224,230,231,232,233,234,240,241,242,243...
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