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1、五年级小数乘除法简便运算50题竞赛； 姓名 分数 2.57.14 16.129916.12 5.20.90.9 7.2899+7.28 4.3500.2 2615.715.724 (1.250.125)8 56.59956.5 7.0910.80.87.09 4.8100.18.717.4 - 8.77.4 12.50.42.58 9.5101 6.81+6.8199 0.251.8740 4.40.83.40.8 2.376.3+2.373.7 2.51.250.32 3.810.1 2.5(3.80.04)7.6105 3.810.1 0.2539+0.25 0.12572 460.33+
2、540.33 (85.27) 1.25 6.85+6.8599 0.2518540 9.599 13.50.98 12.58.8 7.0523.7+7.0576.30.1253.22.5 12.81(1.5+7.81)1.8 8.72.6+6.48.7+8.7 （12.250.856.7）8 2.651.71.351.7 82512516 4.0425 45.55-（68215.55） 3.2993.2 4.839614.8 34.5217.8712.23 2.565+452.5 9.451019.45 0.125324.656484.64.64 3.62.5+7.53.6 4.30.9 6.5102 4.57+3.17+3.43+5.833.2599+3.25 1.825 2.51.381.4 503.270.2 19.20.54+19.20.46
