CLASS 4 ASSIGNMENT 2020

Maths-
(Chapter-3)
Large Number
Q1:Learn and write the following.
1: Smallest 4 digit number-1000
2:Largest 4 digit number-9999
3: Smallest 5 digit number- 10000
4: Largest 5 digit number – 9999
5: Smallest 6 digit number- 100000
6: Largest 6 digit number- 999999
7: Smallest 7 digit number- 1000000
8: Largest 7 digit number-9999999
Q2: Complete book exercise on page no 7and 8.

Exercise 3(A)

Q1 : Write in the short form in your fair copy.
A: 60000+4000+0+20+8.
B: 40000+2000+ 600+90+2.
C: 800000+ 400+ 80 +8.
Q2: Write in words.

a:12000, b:98.704, c:26.08,000, d:85479270.

Computer

Chapter 1 (Know your computer).
Q: Solve book exercises.
(B)1: Liquid crystal display.
2: Cathode Ray tube.
3:Visual Display unit.
4: Central Processing unit.
5: Random Access Memory.
6: Read Only Memory.
(C )1: Printer/Output- Compact disc/ storage.
2:Joystick/Input- Webcam /Input
3:Headphone/Input- Monitor/Output
4:Keyboard/Input- Pendrive/storage,scanner.
(D)1: False, 2:True,3: False,4: False.
Q1: Do these questions in the copy.
1: Give one example of
A: Input device
Ans:Keyboard
B: Output device
Ans: Monitor
Q2 : What are input and output devices used for?
Ans: Input devices are used to give or put the instruction to the computer output devices are used to show the result of the computer's work.