1、010203040506070809010025529925520102030405060708090100相邻的数相邻的数25529()()()()()()242651538102552901020304050607080901002552相邻的相邻的整十数整十数25529()()()()()()203050600109010203040506070809010025529010020030040050060070080090010005015025035045055065075085095020 350 530 420 100020530420能不能准确地找到能不能准确地找到183183?
2、20350420530100001002003004005006007008009001000501502503504505506507508509502053042020350比位数,位数多的数就大。比位数,位数多的数就大。1000420530两位数两位数三位数三位数四位数四位数01002003004005006007008009001000501502503504505506507508509502053042020 1000350 420530位数相同时,从高位比起。位数相同时,从高位比起。1001201501701101301401601801902001831001201501701
3、10130140160180190200abcdefga=106b=132f=183c=149d=165g=199e=171字母所表示的数字母所表示的数:100120150170110130140160180190200abcdefga=106b=132f=183c=149d=165g=199e=171106105107149 e f148150170172182184字母所表示的数字母所表示的数:相邻的数:相邻的数:(-1,+1)171183100120150170110130140160180190200abcdefga=106b=132f=183c=149d=165g=199e=171字
4、母所表示的数字母所表示的数:相邻的相邻的整十数整十数:(去尾,凑十)(去尾,凑十)106100110149 e f1401501701801801901711831064319001002004005008001000106-6=100106+94=200431-31=400431+69=500900-100=800900+100=1000去尾去尾凑百凑百3335553825030703913030306326394504491000988743753273732100993043106404603431587874505050 10 1 2 36 7 8 9在数射线上,哪个数在在数射线上,哪个数在0 0和和600600的正中位置?的正中位置?0100200300400500 600700800900100050150250350450550650750850950在数射线上,哪个数在在数射线上,哪个数在770770和和820820的正中位置?的正中位置?说说你的收获?说说你的收获?