五年级数学简便运算竞赛试题.doc

五年级数学简便运算竞赛试题班级： 姓名： 简便运算：6.9+4.8+3.1 0.456+6.22+3.78 5.17-1.8-3.2 13.75-(3.75+6.48) 3.68+7.56-2.68 0.2516.24(1.25-0.125) 8 3.6102 35.6-1.8-15.6-7.2 3.82+2.9+0.18+9.1 4.8100.1 13.35-4.68+2.653.723.5+6.283.5 4.23.5 15.613.1-15.6-15.62.1 4.87.8+780.52 56.59.9+56.5 3201.2587.0910.8-0.87.09 9.60.80.4 1.252.532 3.20.2512.5 0.79199 1010.87-0.91873.9(1.35)