1、用计算器探索规律,0.0909,0.1818,0.4545,0.2727,0.3636,09,18,27,36,45,用计算器计算下面各题,111 = 211 = 311 = 411 = 511 =,商的规律是：1.商都是循环小数；2.循环节是被除数的9倍。,不计算,你能用发现的规律直接写出下面的几题的商吗?,611=711=811=911=,0.5454,0.6363,0.7272,0.8181,21,22.11,222.111,2222.1111,37 =3.36.7 =3.3366.7 =3.333666.7 =,积都是由“2”和“1”组成的；而且个数都与因数中“ 3”的个数相等。 因数
2、一共有几位小数，积就几位有小数。,你发现了吗？,21,22.11,222.111,2222.1111,根据规律很快写出后两题的结果,22222.11111,37 =3.36.7 =3.3366.7 =3.333666.7 =,3.33336666.7 = 3.3333366666.7 =,222222.111111,444.222,4444.2222,6.6666.7 = 6.666666.7 =,67 = 42 6.66.7 = 44.22,试一试：,练习: 用计算器计算前3题,直接写出后3题的得数:,1234.56799 = 1234.567918= 1234.567927= 1234.567936= 1234.567945= 1234.567954=,11111.1111,22222.2222,33333.3333,44444.4444,55555.5555,66666.6666,让我们一起来总结一下，以后你遇到像上面这样的有规律的问题时，该怎么解决呢？,1、先观察题目已经给你的算式，从中总结出 规律。,2、运用自己发现的规律去解决接下来的问题。,4.69.6 = 6.96.4 = 1.48.2 = 2.84.1 = 2.693 = 396.2 =,算一算，找规律：,44.16,44.16,11.48,11.48,241.8,241.8,
