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What is obtained by dividing 0.625 by 0.025?

Answer and explanation

Correct answer: 25

The governing concept is decimal division. To remove the decimal points without changing the quotient, multiply both the dividend and divisor by 1000, because each has at most three decimal places. Thus, 0.625 ÷ 0.025 = 625 ÷ 25. Now 25 × 25 = 625, so 625 ÷ 25 = 25. Therefore, option B is correct. Option A, 2.5, would result from an incorrect placement of the decimal point. Option C, 250, is ten times too large, while option D, 0.25, is much too small. Multiplying both numbers by the same nonzero number preserves their ratio, which is why this method is valid.

Related tags

Number-SystemsDecimal-RepresentationDecimal-DivisionDecimal RepresentationNumber SystemsMathematicsClass 9 Mcq

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