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江西省2012年中考数学样卷试卷题(四)有一道关于近似计算的题目,很多同学在处理最后结果时发生错误.下面让我们一起来探讨分析这道题目:如图,这是学校在学生中征集的生物园一侧围栏纹饰部分的设计图案.其中每个圆的半径均为15cm,圆心在同一直线上,且每增加一个圆形图案,纹饰长度就增加bcm.围栏左右
Jiangxi Province in 2012 the entrance exam mathematics sample exam questions (d) There is a topic on the approximate calculation, many students in the final results of the error. Let us explore together to analyze this topic: Figure, this is the school students In the collection of biological garden side of the decorative part of the decorative pattern design.Which radius of each circle are 15cm, the center line in the same line, and for each additional circular pattern, decoration length increases bcm. Around the fence