3.5用计算器探索规律1 .填表。单价（元）数量总价（元）牙膏3支28.5毛巾8.254块牙刷5把9.952 .在括号里填上适当的数。()X7= 11.55()X25=810124X()=460.0436X()=4035.63 .用计算器，计算前四题，直接写出后三题的得数。3X4 =3.3 X 3.4 =3.33 X 33.4 =3.333 X 333.4 =3.3333 X 3333.4 =3.33333X33333.4 =3.333333 X 333333.4 =4 .用计算器计算下面各题，并照样子再编三道题，直接写出结果。(10 1) +0.9 = (200 2) + 0.9 =(3000 3) +0.9 = (4000 4) +0.9 = 答：1. 9.533 1.992. 1.6532.43.71112.1111111.2222223. 1211.22111.2221111.222211111.222221111111.22222224. 10220 3330 44440(500000 5) +0.9 = 555550(6000000 6) +0.9 = 6666660(70000000 7) +0.9 = 77777770