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1、用简便方法计算。47.83+2.56+1.44+2.179983 72125 861024823+4876+48 5678+56+215610284 43101 10236-725.74-(5.74-6.8) 4.78-(3.78-6.5)85 -(65-78) 5238+48381.7847-0.7847 102 651800254 3600 7280599 3798+37+37 15004254.03+2.44-3.03+1.56 8.7125898 45 10126 4327-43176218-862 861.56-0.5686840008125 0.7323+0.73773.67-(0
2、.78+2.67) 8.05+7.43+1.95703.5425 43273-73431-73101 65 3225125 4825452820 68102 136-(36-74)4.73+2.69+5.27-2.69 3.14+8.59-3.14+0.419.43+14.59-5.43+14.59 5.07+4.93-8.29456007080 6200125875 99 3400425 10145-453969+6961 6325+2536+2583001258 4900 146.75+2.73+3.25+6.27 3.26+4.38-3.26-2.38523+149+477-49 122521