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第6课时用计算器探索规律不夯实基础,难建成高楼。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。()711.55()25810124()460.0436()4035.63. 用计算器,计算前四题,直接写出后三题的得数。(1)343.33.43.3333.43.333333.43.33333333.43.3333333333.43.333333333333.4(2)81988.2988.83988.884988.8885988.88886988.88888794. 先找出规律,再填数。(1)1,1.1,1.3,1.6,(),(),3.1(2)0.81,0.64,0.49,0.36,(),()(3)3,1.5,0.75,0.375,()(4)40,10,2.5,0.625,()重点难点,一网打尽。5. 试一试,你会用计算器计算多步计算题吗?6. 根据33366731001001填空,再用计算器检验。3336676_3336679_33366712_33366718_33366724_33366727_举一反三,应用创新,方能一显身手!7. 用计算器探索规律。(1)先用计算器算出前四个算式,再根据规律直接写出其他算式的得数。181128212383123484123458512345686123456787(2)用计算器算出下面算式的得数。5325327496496753253211 4964961153253213 4964961353253277 4964967753253291 49649691532532143 4964961435325321001 49649610018. 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。(101)0.9_(2002)0.9_(30003)0.9_(40004)0.9_ _ _ _第6课时1. 9.5331.992. 1.6532.43.71112.13. (1)1211.22111.2221111.222211111.22222111111.2222221111111.2222222(2)99.89.879.8769.87659.876549.8765434. (1)22.5(2)0.250.16(3)0.1875(4)0.156255. 0.53.11.550.1553.1102086. 2002002300300340040046006006800800890090097. (1)9989879876987659876549876543(2)略8. 10220333044440(5000005)0.9555550(60000006)0.96666660(700000007)0.977777770
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