人教版-五年级-上,,第3单元,5,用计算器探索规律,0.807 0.807,,. .,. .,3.38 3.39,.,,13 ÷6 1.6,.,,4.68 4.68,.,,9 ÷2 4.5,.,,8 ÷5 1.5,.,,0.02 0.02,.,,7.396 7.396,,.,. .,0.10 0.101,,. .,,,,,,,,,,基础训练,提升训练,拓展训练,基础训练,知识点:用计算器探索规律,1.根据你的发现,把其他算式补充完整111111÷37037=3,222222÷37037=6,( )÷37037=9,( )÷37037=12,555555÷37037=( ),666666÷37037=( ),777777÷37037=( ),333333,444444,15,18,21,提升训练,2.不计算找出规律,写出其他算式的得数0.1+0×0.9=0.1,0.2+1×0.9=1.1,0.3+12×0.9=11.1,0.4+123×0.9=111.1,0.5+1234×0.9=( ),0.6+12345×0.9=( ),0.7+123456×0.9=( ),1111.1,11111.1,111111.1,提升训练,3.根据前3题的结果直接写出后面题的得数。
99.99×0.2=19.998,99.99×0.3=29.997,99.99×0.4=39.996,99.99×0.5=( ),99.99×0.6=( ),99.99×0.7=( ),49.995,59.994,69.993,提升训练,4.根据你的发现,直接写得数4×6=24,3.4×6.6=22.44,3.34×66.6=222.444,3.334×666.6=( ),3.3334×6666.6=( ),2222.4444,22222.44444,拓展训练,5.根据你发现的规律,直接写得数1)99×99=9801,999×999=998001,9999×9999=99980001,99999×99999=( ),999999×999999=( ),9999800001,999998000001,拓展训练,(2)6×9=54,6.6×6.9=45.54,6.66×66.9=445.554,6.666×666.9=( ),6.6666×6666.9=( ),6.66666×66666.9=( ),4445.5554,44445.55554,444445.555554,拓展训练,6.找规律填空。
23×1.1=( ),35×1.1=( ),43×1.1=( ),126×1.1=( ),413×1.1=( ),526×1.1=( ),25.3,38.5,47.3,138.6,454.3,578.6,,,,,。