2. Fill in the blanks,
a) Rational numbers are associative under
b)
is the multiplicative identity of rational numbers,
2
c)
2
2
This illustrates
5 5
(3)
-43)-4)
This illustrates
is the additive identity for integers and whole numbers,
3. State whether the following statements are true (T) or false (F).
a) Division is associative for rational numbers.
b) Zero is the additive identity of rational numbers implies that zero is also the additive
identity of whole numbers and integers,
2
5
3-6-3-6-4)
1 +0+0+1 -2. This illustrates multiplicative identity of rational numbers.
7 7
e) 1 is the multiplicative identity of rational numbers implies that 1 is also the multiplicative
identity of natural numbers, whole numbers and integers,
7
3 1
2 3
1 2
3
1 2
1) For any three rational numbers
5 5
and
-
5 5 5 5
5 5 5
Answers
Answer:
The major disadvantages of using frames are:
Bookmarks only bookmark the top level pages (the framesets themselves). A user is unable to bookmark any of the Web pages viewed within a frame.
Frames can make the production of a website complicated, although current software addresses this problem.
It is easy to create badly constructed websites using frames. The most common mistake is to include a link that creates duplicate Web pages displayed within a frame.
Search engines that reference a Web page only give the address of that specific document. This means that search engines might link directly to a page that was intended to be displayed within a frameset.
Users have become so familiar with normal navigation using tables, the back button, and so on, that navigating through a site that uses frames can be a problem.
The use of too many frames can put a high workload on the server. A request for, say, ten files, each 1 Kilobyte in size, requires a greater workload than a request for a single 10 Kilobyte file.
Older browsers do not support frames.
The advantages of HTML frames include:
The main advantage of frames is that it allows the user to view multiple documents within a single Web page.
It is possible to load pages from different servers in a single frameset.
The concern that older browsers do not support frames can be addressed using the <noframe> tag. This tag provides a section in an HTML document to include alternative content for browsers without support for frames. However, it requires that the Web designer provide two formats for one page.
To Do
Research frames and their uses. Discuss the following topics with other students on the forum:
The merits of designing a Web page with and without frames.
The alternatives to using frames.
Try to cite some examples of good and poor website design using frames of your own.