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五年级简便运算2.5(2.80.04) 3.59101 82.57)1.25360.25640.25 0.12532 0.04290.0489.70.1250.8 10.272.410.2710.278.63.571.96.436.1 98.210198.2 0.125320.5992.45 3.75993.75 4.783.620.385.221.693.31.695.71.69 3610.1 4.59.8(71.271.20.9)0.8 7.74(2.81.3)1.52.2612.79.91.27 3.654336.55.7 760.25第 2 页 共 2 页