Page 16 - Computer Class 05

D. Fill in the blanks.
1. Computers has become an ________ and ________ tool.

2. ________ was the first device used for counting and calculating.

3. ________ invented pascaline.
4. ________ designed Mark I.

5. There are ________ generations of computers.

Descriptive Type Questions

A. Answer the following questions.

1. Why do we use computers?
2. How the early man used to calculate and count?

3. Describe Abacus.

4. What was the use of Napier’s Bones?

5. Explain Pascaline.

6. Describe the different types of computers.
B. Write few words about each of the following.

1. Counting devices of cavemen : _________________________________________

___________________________________________________________________

2. UNIVAC : ___________________________________________________________
___________________________________________________________________

Application Based Question

Help your friend to solve the following problem.

The tour was organised for 2275 students of a school during their summer holidays. If
each student paid ` 475, how much money was collected for the tour?

__________________________________________________________________________

Do you know a Robot works just like a computer? Gather information about the process
of its working and prepare a presentation on it. Also, write a few lines about Robot in
your scrapbook.

Computer-5 16 Computer-1