五年级小数竖式计算(10页).doc
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1、-五年级小数竖式计算-第 10 页68.84 85.4416 67.515 289.918 101.79 243.264 16.828 15.6240.13815 1.3527 0.41632 3.645291.23.8 0.7560.18 51.30.27 260.132101.4 2.6880.56 10.62525 126451025 2.77.5 150.06 25.60.03214.362.7 8.336.2 1.70.03 32421.251.2 2.410.7 4.50.07= 6.30.09= 2.53.6= 19.83.3= 50.25= 0.760.4= 2.360.22=
2、 2.84.58= 3.574.2= 82.836= 452.46= 3.60.24= 382.545= 6.45.48= 13.424.73 = 9.658.12 = 7.231.2 = 6.312 = 2.148.3 = 4.91.12 = 21.982.31 = 0.2428.37 = 29.133.14 = 9.8811.21 = 5.511 = 7.50.5 = 61.2 = 3.28 = 7.20.9 = 241.2 = 120.12 = 6.750.25 = 120.75 = 210.7 = 16.90.13= 1.553.9= 3.70.016= = 0.30.15= 3= 5
3、= 8= 7.357= 10.01= 4.6922.3= 5.52.02= 3.140.68= =5.261.6= 0.856.3= 3573=4、判断。(1)如果两个因数的积不是小数,那么这两个因数一定不是小数。( )(2)一个不等于0的数的倍一定比原数大。 ( )(3)因为1235=420,所以1.23.5=42.( )(4)在表示近似数时,也可以写成5。( )(5)整数乘法的交换律、结合律和分配律,对于小数乘法同样适用。( )(6)0.259.9=0.25(10-1)。( )(7)与大小相等,表示意义也相同。( )(8)精确到百分位约是4.00.( )(9)一个数(0除外)除以小数,商一
4、定比这个数大。( )(10)两个数相除的商是,被除数不变,除数扩大10倍,商是9.( )5、把下列各式中的乘积点上小数点,使等式成立。 9.362.7=25272 0.896.43=57227 52.11.98=103158 26.153.4=88914.50.07= 6.30.09= 2.53.6= 19.83.3= 50.25= 0.760.4= 2.360.22= 2.84.58= 3.574.2= 82.836= 452.46= 3.60.24= 382.545= 6.45.48= 13.424.73 = 9.658.12 = 7.231.2 = 6.312 = 2.148.3 = 4
5、.91.12 = 21.982.31 = 0.2428.37 = 29.133.14 = 9.8811.21 = 92040= 78060= 96040= 7997= 2832 5425 4861 2337= 4658= 32652= 4512 3312= 3269= 0.828 36 97.2 24 7.65 0.85 220.3 0.7 58.9 31 7.67 5.9 83.2 3.2 8.424 1848 23184 7.6525 0.9835 2.52525 8456 140.73 8 2.872 1.562.4= 1.440.015= 2.8980.18= 85.4416 42.8
6、47 101.79 67.515 230.46 21.2436 0.73623 43.512 35.217 39.624 85.4416 42.847 101.79 67.515 230.46 21.2436 0.73623 43.512 35.217 39.624 0 0.828 36 97.2 24 7.65 0.85 220.3 0.7 58.9 31 97.2 5.4 8.424 1848 23184 7.6525 0.9835 2.52525 8456 140.73 82.872 1.562.4= 1.440.015= 2.8980.18= 85.4416 42.847 101.79
7、 67.515 230.46 21.2436 0.73623 43.512 35.217 39.624 85.4416 42.847101.79 67.515 230.46 21.2436 0.73623 43.512 35.217 39.624 0.660.3 11.971.5 69.62.9 1.440.015= 2.8980.18= 1.440.015= 2.8980.18= 8= 3= 7= 2325= 14= 28= 60050= 420.16= 840.25= 0.9= 3= 200.5= 6= 10000.09= 27= 580.32= 52= 0.54= 2.4= 0.16=
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