Real Numbers and Their Decimal Expansions

Author:Nagaland Board Of School Education
9th Nagaland Board
IMPORTANT

Important Questions on Real Numbers and Their Decimal Expansions

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IMPORTANT

If 0.001 is expressed in the simplest form as pq, where p and q are integers and q0, then find the value of p+q.

MEDIUM
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Express 0.47 in the form pq, where p and q are integers and q0

EASY
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Express 0.6- in the form pq (in the simplest form), where p and q are integers and q0.

EASY
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Write 329400 in decimal form and say what kind of decimal expansion it has?

EASY
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Write 211 in decimal form and say what kind of decimal expansion it has?

EASY
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Write 313 in decimal form and say what kind of decimal expansion it has?

EASY
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Write 418 in decimal form and say what kind of decimal expansion each has?

EASY
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Write 111 in decimal form and say what kind of decimal expansion it has?

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Write three numbers whose decimal expansions are non-terminating non-recurring.

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Look at several examples of rational numbers in the form pq q0, where p and q are integers with no common factors other than 1 and having terminating decimal representations (expansions). Can you guess, what property q must satisfy?

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What can the maximum number of digits be in the repeating block of digits in the decimal expansion of 117? Perform the division to check your answer.

MEDIUM
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Express 0.99999 in the form pq. Are you surprised by your answer? With your teacher and classmates discuss why the answer makes sense.

MEDIUM
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You know that 17=0.142857¯. Can you predict what the decimal expansions of 27,37,47,57,67 are, without actually doing the long division? If so, how?

EASY
IMPORTANT

Write 36100 in decimal form and say what kind of decimal expansion it has?