五年级计算比赛试题.doc

五年级计算比赛试题6.94.83.1 0.4566.223.78 15.89(6.755.89)4.025.40.98 5.171.83.2 13.75(3.756.48)3.687.562.68 7.852.340.854.66 35.61.815.67.23.822.90.189.1 9.64.83.6 7.140.532.47 5.272.860.661.63 13.354.682.65 73.81.6413.85.36 47.87.45+8.8 0.398+0.36+3.64 15.75+3.590.59+14.25 66.868.661.34 0.2516.24 (1.250.125)8 3.6102 3.723.56.283.5 36.83.96.1 15.613.115.615.62.1 4.87.8780.52 324.90.94.8100.1 56.59.956.5 7.0910.80.87.09 91x1.3 x5+9=21 48-27+5x=31410-3x=170 x+2x+18=78 (200-x)5=30 (x-140)70=4 (27.5-3.5)x=4 x+19.8=25.82x-20=4 2(x-3)=5.8 9.8-x=3.8 3x+6=18 65x+7=42 75.6x=12.62(2.8+x)=10.4 9x+42.591 (x-3)2=7.55(x+8)=102 3x=x+100