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Question Easy Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 21

\(\frac{9}{20}\) का दशमलव प्रसार कितने स्थानों पर समाप्त होता है?

After how many decimal places does \(\frac{9}{20}\) terminate?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

\(20=2^2\times5\).

Step 2

Why this answer is correct

The larger exponent is (2), so the decimal terminates after (2) places.

Step 3

Exam Tip

Exam tip: The actual decimal (0.45) confirms the same result. चरण 1: \(20=2^2\times5\) है। चरण 2: बड़ी घात (2) है, इसलिए दशमलव (2) स्थानों पर समाप्त होगा। चरण 3: परीक्षा सुझाव: वास्तविक दशमलव (0.45) भी इसी बात की पुष्टि करता है।

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