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1、1 用简便方法计算用简便方法计算 4.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 3.070.381.62 82.451.55 23.40.813.47.2 0.32403 0.2536 12.7(3.70.84) 36.541.764.54 7.60.80.27.6 0.85199 0.258.54 1.288.60.728.6 12.50.960.8 10.49.60
2、.35 2 0.8(4.31.25) 3.123.1299 28.610128.6 (4.236.17)0.8 0.8615.70.8614.7 2.4102 147.322.68 2.648.677.3611.33 2.311.20.5 (2.50.25)0.4 9.161.50.59.16 3.63.60.5 4.51.8 4.23.5 9300.65 63.42.50.4 4.91.4 3.9(1.35) (7.71.54)0.7 2.52.4 2.745 0.351.2520.8 32.40.90.132.4 150.25 7028 15(0.150.4) 4.252.59.90.17