计算型是指根据对话中给出的数字和相关信息，通过简单的加、减、乘、除来算出正确答案的类型。
例1：
W：Did you go to the football match last Saturday？
M：Oh，yes．It was supposed to start at 2：30，but it was delayed fifteen minutes．
Q：When did the football match start？
AAt2：35．BAt2：45．CAt3：00．DAt3：20．
（答案为B）
例2：
W：Prof．Clark said that the mid-term exam would cover the first fifteen lessons．
M：Really？I thought it only included the first twelve lessons．Then I must spend the weekend to go over the rest of the lessons．
Q：How many lessons must the man review over the weekend？
AFive lessons．BThree lessons．
CTwelve lessons．DFifteen lessons．
（答案为B）
例3：
M：I'm in charge of buying the fruit for the children of this class．I'm so happy to find that apples and pears are in season．Give me two dozen of each．
W：I hope that they're as good as they look．
Q：How many apples did the man buy？
A12．B48．C36．D24．
（答案为D）
例4：
W：How much time did you have for writing the paper？
M：We were given three hours，but I finished in less than half the time．
Q：How long did it take the man to write the paper？
AM ore than an hour and a half．
BNot more than half an hour．
C．More than two hours．
D．Less than an hour and a half．
（答案为D）
例5：
W：Here's a ten-dollar bill．Give me two tickets for tonight's show， please．
M：Sure．Tow tickets and here's a dollar forty cents change．
Q：How much does one ticket cost？
A．＄1．40．B．＄4．30．C．＄6．40．D．＄8．60．
（答案为B）
其中加减法计算型试题（如例1、2）出现频率最高。乘除法（如例3、4）和加减乘除混合计算型试题（如例5）难度稍大。不过，一般都不会超出心算范围。
答题技巧：
1．计算型选择项凡是在对话中出现过的数字都不是答案，如例1至例5。
2．计算型多数是给出具体数字和相关变量，求另一个具体数
字。例1中用具体数字2：30加上变量fifteen minutes即得结果2：45，所以答案选B。也有少数计算题给出2个具体量，求变量。如例2。
3．注意数量单位与单位基数的不同。如：a penny ＝one cent，a nickel＝five cents，a quarter ＝twenty-five cents，a half dollar ＝fifty cents等。星期、日期、时、分的换算进率分别为7、30／31、24、60等。再如a quarter指时间是15分钟，指月份是一季度（三个月），指百分比为25％。由于每个对话间隔时间短，既要回忆对话内容，又要阅读选择项，还要进行计算，因此，熟练掌握换算进率十分必要。
掌握以上数字与计算类听力对话题的测试类型和答题技巧，有利于参赛学生在竞赛中更好地发挥水平，提高答题效率，做到事半功倍。
