五年级上册数学小数乘法的简便计算.ppt

习题课件习题课件小数乘法的简便计算小数乘法的简便计算RJ 五年级上册五年级上册 1 1小数乘法小数乘法1用简便方法计算。用简便方法计算。8.8812.5812.50.812.50.0812.51001011116.5934.565.56.596.59(34.565.5)6.591006590.9910.1 73.410173.473.4(1011)73.41007340 0.99100.990.19.90.0999.9993.26993.26 44.42.5402.542.50.42.51001011113.26(991)3.261003262用简便方法计算。用简便方法计算。12.53.20.25 6.42.51.25(0.42.5)(81.25)2110220(12.50.8)(40.25)101100.1259.628096.2 2.54.4(0.1258)(9.6210)96.2196.296.202.541.1101.1113用简便方法计算。用简便方法计算。66.6922.223 1.256.170.12518.31.256.171.251.831.25(6.171.83)1.2581011.15411.14611.1(5446)11.1100111099.910.199.99910010.110099.90.110.1199.9100(10.199.9)1.0199.9100110100.9111000100.9110899.093.20.450.324.20.032133.20.453.20.423.20.133.2(0.450.420.13)3.213.25.57.7330.555.55.57.73.35.55.515.5(7.73.31)5.510559.992223.333333.333.336663.333333.3313.33(6663331)3.3310003330Thank you!Thank you!