2 数字的计算
在听力考试中，单纯的数字辨认题并不多，更多的是数字计算类题目。在这类题目中，考生不仅要识别数字，还要洞悉数字之间的关系。通常情况下，表达加减含义的题目是通过类似more，less，fast，slow，before，after，late，early 等形容词或副词来表达，而表达乘除含义的题目是通过倍数、分数、百分比等词来加以表述的。如：
A is N times as large as B，A is N times larger than B，A is larger than B by N times 均表示A的大小是B的N倍，或A比B大N－1倍。
数字计算类题目涉及距离、人口、价格、时间等方方面面。
Example
You will hear：
Man：How many students took the final exam on January 8？
Woman：Well，I believe that we had twenty⁃three students from Class One，twenty⁃four students from Class two and twenty students from Class Three.
Question：How many students altogether did the woman believe had taken the final exam？
You will read：
A.67 students. B.43 students. C.23 students. D.24 students.
此题是一道连续加法题，因为题目中关键词是 altogether，即参加期末考试的学生总人数，所以23加24再加20就能得出答案A。
Example
You will hear：
Woman：Your cousin graduated in 2016.What about you？
Man：Ifinished school a year later.
Question：When did the man graduate？
You will read：
A.2015. B.2016. C.2017. D.2018.(https://www.daowen.com)
本题的解题关键为 later 一词。男士比表弟晚毕业一年，故正确答案应为C项。
Example
You will hear：
Woman：Excuse me，could you tell me when the next train to Chongqing is？
Man：Sure.It’s three now.The next train to Chongqing leaves in two hours.But you can take a train to Chengdu，which leaves in 15 minutes，and then get off at Chongqing because it stops at Chongqing on the way.
Question：At what time does the train to Chengdu leave？
You will read：
A.5：00. B.3：15. C.3：00. D.2：00.
本题中男士建议女士搭乘去成都的列车，中途在重庆下车。由于现在时间为3点，去成都的列车15分钟后出发，故正确答案应为B项。
Example
You will hear：
Man：I’d like to buy these four thanksgiving cards.Are they fifty cents each？
Woman：Three of them are，but the smaller one is only a dime.
Question：How much are the cards all together？
You will read：
A.＄1.6. B.＄1.75. C.＄1.55. D.＄2.
男士想买四张感恩卡，前三张50美分一张，第四张需要10美分。如果知道 a dime 是10 cents，那么这道题就很容易得出A这个答案了。