9．
Have you ever thought about one question：why do we need to learn math？
It is an interesting question．Kids around the world have been asking it for years．For US students，they may get the answer from a new exhibition called"Math Alive!"（1）47 activities are designed to teach kids how math is used in everyday life．For example，at one exhibition station，visitors can test that a person's arm span（臂展） equals their height．At another station，visitors can control the robot with the help of math skills．
The exhibition will visit 15 US and international cities in the next five years．Organizers say they want more kids to learn why math is important in daily life．Think of simple things，like clocks．They tell time，but only if you know how to read them．That means using math．How much longer until school ends？How long did you sleep last night？That's all math，too．
（2）When you go ，you also do lots of ．How much change would you get if you paid for a 25.99-yuan sweater with two twenties？How would you calculate a 30% discount？Even when you're not doing math，it's all around you．The computer you use to surf the Internet is a machine to do binary（二进制） math very fast．
So enjoy math，not for exams，but for the wonderful world it helps to build．
1．将（1）句译成中文．47项活动被设计来教孩子们在日常生活中数学是如何被使用的．
2．在（2）句的空白处分别填入一个适当的词使句意完整、上下文通顺．shopping、math
3．回答问题：Why will the organizers hold the exhibition in 15 US and international cities？Because they want more kids to learn why math is important in daily life．
4．在文中找出与Math skills can help visitors control the robot at the exhibition．意思相近的句子，并将它写在答题卡上．Visitors can control the robot with the help of math skills．
5．在文中找出最能表达该短文主题的句子，并将它写在答题卡上．So enjoy math，not for exams，but for the wonderful world it helps to build．．
口算题卡北京妇女儿童出版社系列答案
