Class 9 Math Exercise 1.1 Solved | Number Systems | Easy Urdu + English Explanations

Class 9 Math – Exercise 1.1 | Number Systems | Fully Solved with Easy Explanations

Welcome to Smart Study Notes! In this post, you will find fully solved solutions for Class 9 Math Exercise 1.1 (Number Systems). These solutions are written in both Urdu and easy English to help every student understand the concepts clearly.

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🔢 Topic: Number Systems (اعدادی نظام)

In this exercise, you will learn about:

• Natural Numbers (قدرتی اعداد)
• Whole Numbers (صحیح اعداد)
• Integers (اعداد صحیح)
• Rational Numbers (معقول اعداد)
• Real Numbers (حقیقی اعداد)

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📘 Question 1: Classify the following numbers as:

• Natural Numbers
• Whole Numbers
• Integers
• Rational Numbers
• Real Numbers

Given: -3, 0, 2, 3/4, √2, -7.5 Solution:

Number	Natural	Whole	Integer	Rational	Real
-3	❌	❌	✅	✅	✅
0	❌	✅	✅	✅	✅
2	✅	✅	✅	✅	✅
3/4	❌	❌	❌	✅	✅
√2	❌	❌	❌	❌	✅
-7.5	❌	❌	❌	✅	✅

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📗 Question 2: Which of the following are rational numbers?

Given: -1, 0.25, √3, 7, π (pi) Solution: - -1 → ✅ Rational - 0.25 → ✅ Rational (1/4) - √3 → ❌ Not Rational (Irrational) - 7 → ✅ Rational (7/1) - π → ❌ Irrational ---

📌 Easy Explanation in Urdu:

Rational Number وہ ہوتے ہیں جو کسی fraction کی صورت میں ہوں: a/b (جہاں a اور b integers ہوں اور b ≠ 0)

Natural Numbers: 1, 2, 3, 4, ...
Whole Numbers: 0, 1, 2, 3, ...
Integers: ..., -3, -2, -1, 0, 1, 2, 3, ...
Real Numbers: تمام rational + irrational numbers

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🔗 Related Posts:

• Class 9 Math – Exercise 1.2 Solved
• Chapter 1 MCQs with Answers