Number System Ch-1 Class 7th

EXERCISES:-

A) Tick the correct answers.

1. Which of these number system has only two digit?

Ans- Binary

2. Which of these means of in the binary number system?

Ans- 0

3. Which of these is the right most position in a positional number system?

Ans- ones,unit

4. Which of these number system has the base 16?

Ans- hexadecimal

5. Which method is used to convert a binary number into a decimal number?

Ans-multiplication

B) fill in the blanks.

1. The decimal number system consists of digit o to 1

2. The base of the octal number system is 8

3. The binary digit 1 mins on.

4. The value of the power for each digit increases by 1 as you move from right to left to 10.

5. In binary addition the output of 1 + 1...............

C) write true or false statements.

1. The base of hexadecimal number system is 7 -false

2.(1231)8 is an example of decimal number.-false.

3. Computer understand only machine language.-True

4. In binary addition output of 0 + 1 is 0-false

5. You borrow a digit from the next position when you subtract 0 - 1-True.

D) Answer the following questions.

1. What is a number system? List different type of number system.

Ans-There are various types of number systems and the most commonly used ones are decimal number system, binary number system, octal number system, and hexadecimal number system.

2. Explain the decimal number system.

Ans-A number system that uses a notation in which each number is expressed in base 10 by using one of the first nine integers or 0 in each place and letting each place value be a power of 10.

3. Describe the binary number system.

Ans- In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically "0" and "1". 

4. Distinguish between octal and hexadecimal number system.

Ans- The octal number system is a base-8 number system and uses the digits 0 - 7 to represent numbers. The hexadecimal number system is a base-16 number system and uses the digits 0 - 9 along with the letters A - F to represent numbers.

5. How do you convert a binary number system into decimal number system? describe.

Ans- Not come in exam