五年级简便计算奥数题.doc

奥数班摸底测试卷班级 姓名 .一、简便计算下列各题：（110小题每小题5分，1115小题每小题10分）1. 2.51.25.3.22.0.1250.250.5643. 3201.2584.2.47.67.66.57.60.765. 3.745.862.60.586. 20050.3750.37519493.752.47.2016201.620.162.0168. 22.89845.69.5.2111166660.810.999.90.280.666637011.0.270.2512. 1.253.141250.025712500.0022913.18.30.255.30.43.132.514.3.631.443.96.4(提示：43.9=31.4+12.5)15.754.715.925二、附加题1. 计算：20.0539200.54.14010.025（提示：4010025=22010.025=2020.05）2.计算：1.13.35.57.79.911.1113.1315.1517.1719.193.计算：(10.120.23)(0.120.230.34)(10.120.230.34)(0.120.23)3.计算：(21.232.34)(1.232.343.45)(1.232.34)(21.232.343.45)（提示：令M=1.232.34，N=1.232.343.45,将原式化简为M,N的表达式）4.比较下面两个乘积A，B的大小A=9.87327.2345B=9.87337.2344