问题 解答题
计算下列各题
(1)(-2.4)+(-3.7)+(+4.2)+0.7+(-4.2);
(2)
1
3
+(-
3
4
)+(-
1
3
)+(-
1
4
)+
18
19
答案

(1)(-2.4)+(-3.7)+(+4.2)+0.7+(-4.2)

=[(-2.4)+(-3.7)+(-4.2)]+[(+4.2)+0.7]

=-10.3+4.9

=-5.4;

(2)

1
3
+(-
3
4
)+(-
1
3
)+(-
1
4
)+
18
19

=[

1
3
+(-
1
3
)]+[(-
3
4
)+(-
1
4
)+
18
19

=-1+

18
19

=-

1
19

完形填空

根据短文内容及首字母提示,填写所缺单词,将答案按序号填入下面表格内。

Reading books is a good hobby for all kinds of reasons.

First, reading books is f小题1:. You can always keep yourself interested and help you to have an enjoyable time if you like reading. This is especially u小题2:  when the weather is bad. It is a relaxing hobby too. You can really become lost in a book.

Next, you can read a book a小题3: : in a car, in a waiting-room, on a plane, in bed —even in the bath. All you n 小题4: is a book! Reading is a convenient hobby as it is easy to stop and then start again.

A 小题5: good reason for reading books is that it is useful. If you read as a hobby you will get better and better at it. This m 小题6:  that you will read faster and will become better at understanding what you read. As your reading improves, you will probably find your schoolwork becomes much e 小题7:. Many school subjects depend on(依靠) good reading and, as you read, you learn more and more.

Some people say that reading is out of date(过时). This is not t小题8: . You have to be able to read to use a computer and, the better you read, the better your computer skills will be. Reading is never out of date!

Good readers are most likely to be good w 小题9: , too. They are usually good at spelling as well, and have more things to write about. Reading books is a wonderful hobby, one of the best. W 小题10:  other hobby could be more useful, or more enjoyable?

判断题