探索与发现（一）有趣的算式.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,有趣的算式,华远君城小学 毋晓颖,11,1111,111111,11111111,121,12321,1234321,123454321,1,1111111111,小组合作要求：,1,、独自思考写出答案。,2,、四人小组交流方法。,3,、汇报讨论，寻找规律。,11,1111,111111,11111111,121,12321,1234321,123454321,1,回文数,1111111111,回文诗：,僧游云隐寺，寺隐云游僧,回文联：,雾锁山头山锁雾,天连水尾水连天,神奇的“,9”,9999999999999999=,不计算你能直接写出这个算式的积吗,?,11 =,1111 =,111111 =,11111111 =,1111111111=,111111111111 =,11111111111111=,11111111 11111111 =,111111111 111111111 =,1,121,12,321,1234321,123454321,12345654321,1234567654321,123456787654321,12345678987654321,9,9,9,9,9,9,9,9,9,8,8,8,8,8,8,8,8,7,7,7,7,7,7,7,6,6,6,6,6,6,5,5,5,5,5,4,4,4,4,3,3,3,2,2,1,1,12,123,1234,12345,123456,1234567,12345678,123456789,8,8,8,8,8,8,8,8,8,+1=,+2=,+3=,+4=,+5=,+6=,+7=,+8=,+9=,111111111111111111111111111111111111111111111111111111,1,12,123,1234,12345,123456,1234567,12345678,123456789,9,9,9,9,9,9,9,9,9,+,2,=,+,3,=,+,4,=,+,5,=,+,6,=,+,7,=,+,8,=,+,9,=,+,10,=,55,=,555=,5555=,55555,=,555555=,5,555555,=,555,55555=,1210123210,12343210,1234543210123456543210123456765432101234567876543210,22,222,2222,22222,222222,2222222,22222222,很神奇，是不是？,88888888888888888888888888888888888888888888,9 98 987 9876 98765 987654,9876543 98765432,9,9,9,9,9,9,9,9,+7=+6=+5=+4=+3=+2=,+1=+0=,19,2,129,3,1239,4,12349,5,123459,11,111,1111,123456,11111,6,111111,9,7,1111111,142857,1=,142857,2=,142857,3=,142857,4=,142857,285714,428571,571428,1,4,2,8,5,7,1,1,2,3,4,5,6,奇怪的,142857,1,4,2,8,5,7,2,1,2,3,4,5,6,奇怪的,142857,1,4,2,8,5,7,3,1,2,3,4,5,6,奇怪的,142857,1,4,2,8,5,7,4,1,2,3,4,5,6,奇怪的,142857,1,4,2,8,5,7,5,1,2,3,4,5,6,奇怪的,142857,1,4,2,8,5,7,6,1,2,3,4,5,6,奇怪的,142857,=,99,142,857,=,999,14,28,57,142857142857=20408122449,20408,122449,=,142857,142857 7=999999,