江苏省单招文化总分的计算方法是根据考生在各科目中的得分情况来综合评定。18年江苏单招文化总分的具体分数线因不同年份和省市而异，所以我们需要结合具体的数据进行分析。

In Jiangsu Province, the total score for the cultural subjects in the independent recruitment examination is calculated based on the scores obtained by candidates in various subjects. The specific score for the total cultural subjects in the 2018 Jiangsu independent recruitment examination varies from year to year and across different regions, so we need to analyze the specific data.

首先，我们需要了解江苏省单招文化考试的科目设置和各科目的满分分值。根据江苏省教育考试院的规定，江苏单招文化考试一般包括语文、数学、外语、物理、化学和政治等科目。每个科目的满分分值也不尽相同，一般在100到150分之间。

Firstly, we need to understand the subject setting and maximum scores for each subject in the cultural examination for independent recruitment in Jiangsu Province. According to the regulations of the Jiangsu Provincial Examination Institute, the Jiangsu independent recruitment cultural examination generally includes subjects such as Chinese language, mathematics, foreign language, physics, chemistry, and politics. The maximum scores for each subject may vary between 100 and 150 points.

其次，我们需要知道每个科目的权重比例。不同科目在总分中所占的权重比例也是影响文化总分的重要因素。根据江苏省的考试制度，一般情况下，语文、数学和外语的权重较高，其他科目的权重相对较低。

Secondly, we need to know the weight ratio of each subject. The weight ratio of each subject in the total score is also an important factor that affects the cultural score. According to the examination system in Jiangsu Province, Chinese language, mathematics, and foreign language generally have higher weight, while other subjects have relatively lower weight.

最后，我们需要了解具体的分数线要求。不同学校或专业的单招文化总分要求也可能不同。一般来说，不同层次的学校对文化总分的要求也有高低之分。

Lastly, we need to understand the specific score requirements. Different schools or majors may have different requirements for the total cultural score in independent recruitment. Generally, schools at different levels may have different requirements for the total cultural score.

总之，江苏省单招文化总分的具体分数是根据考生在不同科目中的得分情况、各科目的权重比例以及具体的学校或专业要求综合决定的。如果你想了解18年江苏单招文化总分的具体分数线，则需要查询相关资料或者咨询当地教育考试部门。

In conclusion, the specific score for the total cultural subjects in the independent recruitment examination in Jiangsu Province is determined based on the scores obtained by candidates in different subjects, the weight ratio of each subject, and the specific requirements of schools or majors. If you want to know the specific score requirements for the 2018 Jiangsu independent recruitment cultural examination, you would need to consult relevant materials or inquire with the local education examination department.