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问题 解答题

3.5×51表示______，10×0.3表示______．

答案

由小数乘法的意义可得：

3.5×51表示51个3.5相加的和是多少；

10×0.3表示10的十分之三是多少．

故答案为：51个3.5相加的和是多少，10的十分之三是多少．

完形填空

读下面一段短文，用括号内所给单词的适当形式填空。

Shanghai is the biggest city with the largest population in the world. It is also the   小题1: (fast) growing city. Its name means “on the sea”, because it sits on the shores of the East China Sea. The city used to be a    小题2:    (fish) town, but these days it is not only a major financial (金融的) centre, it’s also famous for its art and culture.

小题3:   (visit) to Shanghai can be taken from the airport to the centre in a fast train. The train travels up to 430 km per hour. Once you are in the city, you 小题4:  (can) miss a popular area along the Huangpu River. Also, Shanghai Museum is a great place. And if you want to try the local food, you should go to Yang’s Fried Dumplings. You can get some nice dumplings and a bowl of delicious soup for only ¥ 15.

Now Shanghai is getting very “heavy” from all the growth. As a result, the city is going down the soft ground. Since 1921, it has   小题5:  (go) down for almost two meters.
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选择题
对于一组数据1，2，3，2，2，以下判断：①平均数为5；②中位数为2； ③众数为2； ④极差为2。正确的有(   )
A.1个
B.2个
C.3个
D.4个
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