Real Number System Practice: Level 1
Difficulty: 🟢 Beginner | Focus: Identification & Classification
Section 1: Classification
Identify which sets each number belongs to (Natural, Whole, Integer, Rational, Irrational, Real).
1. The number 5
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Answer: Natural, Whole, Integer, Rational, Real.
2. The number -2.5
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Answer: Rational, Real. (It is a terminating decimal).
3. The number 0
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Answer: Whole, Integer, Rational, Real. (Note: 0 is NOT a Natural number).
Section 2: Property Basics
4. Which property is shown? 4 + 9 = 9 + 4
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Answer: Commutative Property of Addition.
5. What is the additive identity of 15?
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Answer: 0 (Because 15 + 0 = 15).