0,2,3,6,9,可组成那些3位数?
答:
0,2,3,6,9,可组成如下60个3位数,从小到大依次排列:
200,202,203,206,209,220,222,223,226,229,230,232,233,236,239,260,262,263,266,269,290,292,293,296,299,300,302,303,306,309,320,322,323,326,329,330,332,333,336,339,360,362,363,366,369,390,392,393,396,399,600,602,603,606,609,620,622,623,626,629,630,632,633,636,639,660,662,663,666,669,690,692,693,696,699,900,902,903,906,909,920,922,923,926,929,930,932,933,936,939,960,962,963,966,969,990,992,993,996,999。
追答抱歉,更正一下:一共是100个,不是60个,手误。