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What is obtained by multiplying 5.08 by 100?

Answer and explanation

Correct answer: 508

The governing concept is place value when multiplying by a power of ten. Since 100=10², multiplication by 100 shifts the decimal point two places to the right. Starting with 5.08, the first shift gives 50.8 and the second gives 508; therefore 5.08×100=508. Option C is correct. Option A is smaller and corresponds to moving the decimal point left, as in division by 10. Option B represents multiplication by only 10, because it shifts the point one place. Option D shifts it three places and would correspond to multiplication by 1000. The same result can be checked by writing 5.08=508/100, so (508/100)×100=508.

Related tags

Number-SystemsDecimal-RepresentationDecimal-MultiplicationPlace ValueDecimal RepresentationNumber SystemsMathematicsClass 9 Mcq

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