Be able to do string and math operations and to search and traverse XML with xpath.
能够用XPath进行字符串和数学操作，查找和遍历xml。
As you might guess, Arithmetic operations are the fundamental math operations: addition, subtraction, multiplication, and division.
正如您所猜测的，算术运算是基本的数学操作：加法、减法、乘法和除法。
The Mathematics test at Levels 5 and 6 consists of questions measuring beginning math concepts, problem solving, and math operations.
在第五级和第六级数学能力测验中主要是测量学生的数学概念、对问题的解题方式、数学运算和数学技巧。
应用推荐