Class 9 Exam  >  Class 9 Notes  >  Extra Documents & Tests for Class 9  >  Exercise 1.4 NCERT Solutions: Number System

NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System

Q.1. Visualise 3.765 on the number line, using successive magnification.
Solution:
NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System

Q.2. Visualise NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System on the number line, up to 4 decimal places. 
Solution: 
NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System
NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System

The document NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System is a part of the Class 9 Course Extra Documents & Tests for Class 9.
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FAQs on NCERT Solutions for Class 9 Maths - Exercise 1.4 Number System

1. What are the different types of numbers in the number system?
Ans. The number system consists of different types of numbers such as natural numbers, whole numbers, integers, rational numbers, and irrational numbers.
2. How do we classify a number as rational or irrational?
Ans. A number is classified as rational if it can be written in the form of a fraction or a quotient of two integers. On the other hand, a number is classified as irrational if it cannot be expressed as a fraction and its decimal representation goes on infinitely without repeating.
3. What is the significance of zero in the number system?
Ans. Zero is a significant number in the number system as it acts as a placeholder and plays a crucial role in place value representation. It helps in distinguishing between numbers and holds a position in the number line.
4. How are positive and negative numbers represented in the number system?
Ans. Positive numbers are represented without any sign, whereas negative numbers are represented by adding a negative sign (-) before the number. The negative sign indicates the opposite direction or value of the number.
5. What is the difference between natural numbers and whole numbers?
Ans. Natural numbers include all positive integers starting from 1, whereas whole numbers include zero along with natural numbers. In other words, whole numbers are the set of numbers that include both positive and non-negative integers.
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