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初一數學精選題庫[21]{難度7}［數列排列組合選擇技巧］
初一数学精选题库59/72
![初一数学精选题库[68]{难度6}［五位数排列组合问题］](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/5fef2cb42b5c432582957b4d6fed1ad3~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=iyuPgLNBfurW803gLRqu8TrqAhg%3D)
App03:07![初一數學精選題庫[21]{難度7}［數列排列組合選擇技巧］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/205543be06e24faeb924dfd0056ba093~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=elGyDHCRGIut%2BJd80ortzFsQdXg%3D)
App07:33![初一数学精选题库[28]{难度7}［超长位数分段倍数推导问题］](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/801ab25477de4cc799ca7904401f5533~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=ThleR5qxFco0kdsjK7b3tNNW5e0%3D)
App10:12![初一数学精选题库[43]{难度7}［9字数列求四位数和的最大最小值］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/c78cac4fa48449bbab1465fd36464f95~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=Vov4%2FCSQyUTUVqAzdgBrxUuXXLA%3D)
App21:10![初一数学精选题库[44]{难度7}［圣诞卡片装错的可能状况分析］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/53671999554b4484be1f91a09106afbc~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=qZHq8padz%2Bp2dTqLjd0EpO5DcRU%3D)
App10:46![初一数学精选题库[47]{难度7}［天然神的质数数列］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/c002f58c43024e84b6c5123cd1c678c9~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=e%2B4ansRD%2BFDWbZ3j9lsRD6G33QA%3D)
App13:50![初一数学精选题库[55]{难度7}［整数数列拆解相消运算技巧］](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/76a5cfc7f373435e945acc4fb0216930~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=8%2BScvgF%2F8q9xGmWt%2FzTvtXATwIg%3D)
App10:03![初一数学精选题库[67]{难度7}［两人合作两项工作］](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/4cee2c39409d4bac95f4b45d26bf06c5~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=GxAh3OXTv2wxxQs%2F5q0RVYIpX4Y%3D)
App03:43![初一數學精選題庫[16]{難度8}［分數數列拆解相消運算技巧］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/35c43e4b79be425f9230f3d8fbad8ed1~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=DGvXXvSnJrEFr92LczrftIzo5i8%3D)
App05:16![初一數學精選題庫[20]{難度8}［三位數位置變換直式運算技巧］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/f9cf8725dbfd4d4b8dd34150f010e7cf~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=w4MUhv2BoockTG7hYT1dXVJGKy0%3D)
App10:08![初一数学精选题库[56]{难度8}［完全平方式求解］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/52379e123ec041c3b4b67e5b6805f378~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=zxOEdOmE%2BljiJmktMmnWa0jL6WQ%3D)
App15:17![初一數學精選題庫[18]{難度9}［平方數列用平方差公式］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/93e19fd761f04283becfd8eb495569d7~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=Fn06BXEKdmppQKPndOC3Yoil5%2Fg%3D)
App14:27![初一数学精选题库[29]{难度9}［完全平方多项式因式分解］](http://p26-sign.bdxiguaimg.com/tos-cn-i-0004/936a8b2e747a409586ddfc9886675275~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=ZipZU5V1utRRPkLuc2VvznO5rso%3D)
App15:57![初一数学精选题库[30]{难度9}［数列经过复杂运算后的特征］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/240e9a883fa94ebf950f511372124a8f~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=dyOUOQS0WX48QCnVmn99vykmSHE%3D)
App20:26![初一数学精选题库[66]{难度9}［质数与因数判断］](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/dff069ff795f47f6a4cde5348c394dfa~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202502251537361CFEE2AE98FFF206AD29&requestFrom=704&version_code=80402&x-expires=1772005056&x-signature=36Ix05re%2Fzr8XpVnVMs8i2hvs7E%3D)
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