七年级数学上册第三章有理数的运算3.5《利用计算器进行有理数的运算》随堂练习(新版)青岛版.doc

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七年级数学上册第三章有理数的运算3.5《利用计算器进行有理数的运算》随堂练习(新版)青岛版.doc_第1页
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1、13.5 利用计算器进行有理数的运算1用计算器计算(1)351819;(2)612627;(3)49(52.378.9) ;(4)31.52.527.3(36.5) 2用计算器计算(1) 02.)8()2.0(.3(保留两位小数)(2) 53.153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30 1.80 0.30 0.06/张 0.007/张40 1.80 0.40 0.06/张 0.007/张50 1.80 0.50 0.06/张 0.007/张100 1.80 1.00 0.06/张 0.007/张200 1.80 2.00 0

2、06/张 0.007/张300 1.80 3.00 0.06/张 0.007/张400 1.80 4.00 0.06/张 0.007/张500 1.80 5.00 0.06/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0.060.0072参考答案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30 1.80 0.30 0.06/张 0.007/张 0.137/张40 1.80 0.40 0.06/张 0.007/张 0.122/张50 1.80 0.50 0.06/张 0.007/张 0.113/张100 1.80 1.00 0.06/张 0.007/张 0.095/张200 1.80 2.00 0.06/张 0.007/张 0.086/张300 1.80 3.00 0.06/张 0.007/张 0.083/张400 1.80 4.00 0.06/张 0.007/张 0.0815/张500 1.80 5.00 0.06/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0.060.007

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