育才学习网1.0到9能组成多少个三位数分别是什么
不同阶段做法不同啊。
全部写出来就是这样了 1:000 2:001 3:002 4:003 5:004 6:005 7:006 8:007 9:008 10:009 11:011 12:012 13:013 14:014 15:015 16:016 17:017 18:018 19:019 20:022 21:023 22:024 23:025 24:026 25:027 26:028 27:029 28:033 29:034 30:035 31:036 32:037 33:038 34:039 35:044 36:045 37:046 38:047 39:048 40:049 41:055 42:056 43:057 44:058 45:059 46:066 47:067 48:068 49:069 50:077 51:078 52:079 53:088 54:089 55:099 56:111 57:112 58:113 59:114 60:115 61:116 62:117 63:118 64:119 65:122 66:123 67:124 68:125 69:126 70:127 71:128 72:129 73:133 74:134 75:135 76:136 77:137 78:138 79:139 80:144 81:145 82:146 83:147 84:148 85:149 86:155 87:156 88:157 89:158 90:159 91:166 92:167 93:168 94:169 95:177 96:178 97:179 98:188 99:189 100:199 101:222 102:223 103:224 104:225 105:226 106:227 107:228 108:229 109:233 110:234 111:235 112:236 113:237 114:238 115:239 116:244 117:245 118:246 119:247 120:248 121:249 122:255 123:256 124:257 125:258 126:259 127:266 128:267 129:268 130:269 131:277 132:278 133:279 134:288 135:289 136:299 137:333 138:334 139:335 140:336 141:337 142:338 143:339 144:344 145:345 146:346 147:347 148:348 149:349 150:355 151:356 152:357 153:358 154:359 155:366 156:367 157:368 158:369 159:377 160:378 161:379 162:388 163:389 164:399 165:444 166:445 167:446 168:447 169:448 170:449 171:455 172:456 173:457 174:458 175:459 176:466 177:467 178:468 179:469 180:477 181:478 182:479 183:488 184:489 185:499 186:555 187:556 188:557 189:558 190:559 191:566 192:567 193:568 194:569 195:577 196:578 197:579 198:588 199:589 200:599 201:666 202:667 203:668 204:669 205:677 206:678 207:679 208:688 209:689 210:699 211:777 212:778 213:779 214:788 215:789 216:799 217:888 218:889 219:899 220:999。