2.13用计算器进行运算1．用计算器计算（1）35＋18×19；（2）－6－126×27；（3）49－（52.3＋78.9）；（4）31.5－2.5×〔27.3－（－36.5）〕2．用计算器计算（1）（保留两位小数）（2）3．请用计算器算出印刷成本填入空格中（单元：元）印刷张数蜡纸成本油墨成本纸张成本机器折旧印刷成本301.800.300.06/张0.007/张401.800.400.06/张0.007/张501.800.500.06/张0.007/张1001.801.000.06/张0.007/张2001.802.000.06/张0.007/张3001.803.000.06/张0.007/张4001.804.000.06/张0.007/张5001.805.000.06/张0.007/张设备折旧：7万/1000万＝0.007，单张成本：（蜡纸成本＋油墨成本）/张数＋0.06＋0.0071/2参考答案1．（1）377（2）－3408（3）－82.2（4）－1282．（1）40.00（2）1.7563．如下表：印刷张数蜡纸成本油墨成本纸张成本机器折旧印刷成本301.800.300.06/张0.007/张0.137/张401.800.400.06/张0.007/张0.122/张501.800.500.06/张0.007/张0.113/张1001.801.000.06/张0.007/张0.095/张2001.802.000.06/张0.007/张0.086/张3001.803.000.06/张0.007/张0.083/张4001.804.000.06/张0.007/张0.0815/张5001.805.000.06/张0.007/张0.0806/张设备折旧：7万/1000万＝0.007，单张成本：（蜡纸成本＋油墨成本）/张数＋0.06＋0.0072/2
