1、 脱式计算能简算的要简算 2.57.14 16.129916.12 5.20.90.9 7.2899+7.28 4.3500.2 642.640.5 2615.715.724 (2.275 0.625)0.28 3.94+34.30.2 2.75.43.9 1.2(9.62.4)4.8 8.91.14.7 12.50.42.58 0.873.16+4.64 (1.250.125)86.584.50.9 3.69.85-5.46 8.053.4+7.6 2.80.5+1.58 4.84.80.5 9.59913.50.98 12.58.8 56.59956.5 4.8100.1 4.40.83.
2、40.8 7.0910.80.87.09 8.717.4 - 8.77.4 2.13.0.8257 6.81+6.81990.2518540 (9.37+9.37+9.37+9.37) 2 5 9.51014.21.254.21.75 2.376.3+2.373.7 2.51.250.32 3.810.1 2.5(3.80.04) 7.69101 用竖式计算。 2.523.4 1.0825 0.120.440.0420.54 (验算) 0.250.046 (验算) 2计算下列各题,结果保留一位小数。 4.80.35 3.120.9 5、 计算下列各题,结果保留二位小数。 6.030.25 3.451.24