Chapter Name : Real Numbers |
Sub Topic Code : 104_10_01_05_01 |
Topic Name : Revisiting Rational Numbers And Their Decimal Expansions |
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Sub Topic Name : Revisiting Rational Numbers And Their Decimal Expansions |
What is rational number? Decimal form of rational number.
Basic knowledge of rational numbers.
Observe the terminating decimal forms of rational numbers always have denominator in the form of 2^m*5^n (^ is raised to power,a^2=a*a)
In a 400 m race, the time is recorded with a 3 decimal point precision. An athlete records a time of 15.234s.Is the number a rational number. If it is, then what is the form of the denominator?
Key Words | Definitions (pref. in our own words) |
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Rational number Recurring decimals Terminating decimals | Any number which can be written in p/q form, q ?0 is called rational number. A decimal number of the form a.bcdebcdebcde… i.e., the numbers in the decimal is repeating. A decimal number in which |
Gadgets | How it can be used |
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Rational number decimal forms. | Write down the decimal forms of rational numbers. |
Marks in an exam are rational numbers.
Examples | Explainations |
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Average of a class is 66.666…. write the average in rational form. | 66.666… is 200/3 in rational form. |
Rational numbers decimal notation.
What form of denominator in a rational number exists when the decimal number is recurring decimal or terminating decimal?
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