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When written as a fraction terminating decimals have a denominator that is a product of which factors?
Wiki User
∙ 7y ago
The only prime factors are 2 and 5.
Wiki User
∙ 7y ago
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Why are some fractions recurring and some terminating?
A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.
How fractions are related to repeating decimals and terminating decimals?
Fractions are related to repeating decimals in the sense that a fraction can be represented as a repeating decimal if the denominator has prime factors other than 2 or 5. For example, 1/3 can be represented as 0.3333..., with the 3s repeating infinitely. Terminating decimals, on the other hand, are fractions that have denominators which are powers of 10. For example, 1/4 can be represented as 0.25, which terminates after two decimal places.
What can you conclude about rational numbers that have terminating decimals?
Their denominators have prime factors of 2 or 5.
What is a terminating decimal?
A terminating decimal number is a decimal number with a finite number of digits after the decimal point. For example: 95.3652 It is an exact multiple of a (positive or negative) power of 10. For example: 95.3652 can be written as an exact fraction of 953652 / 10000, or 953652 * 10-4. Rational numbers where the simplified denominator is not a factor of a power of 10 (i.e. where the denominator has factors that aren't divisible by 2 or 5, and are not common to the numerator) are not terminating decimals. For example: - 1/3 (0.333333.....) does not terminate - the sequence of '3's repeats endlessly. Notice that the denominator is a multiple of 3 (and the numerator isn't), so it does not divide any power of 10. - 103/70 (1.4714285714285...) does not terminate. The sequence of numbers '714285' repeats endlessly. The denominator does have 2 and 5 as factors, but also 7 (which is not a factor of the numerator), so it does not divide a power of 10. Irrational numbers (such as π=3.14159265.....), are also not terminating decimals. There is an infinite number of numbers after the decimal point, but unlike fractions, there is no infinitely recurring sequence.
If a fraction's numerator and denominator have no factors other than one in common can the fraction be simplified?
If a fraction's numerator and denominator have no factors other than one in common, the fraction cannot be simplified except if the denominator is 1, in which case the fraction can be simplified to the whole number of the numerator.
How are terminating decimals and repeating decimal reflected in fractions?
If a fraction, in its simplest form has a denominator whose only prime factors are 2 or 5, then the fraction is terminating. If the denominator has any other prime factor then the decimal is repeating.
How can you predict whether a fraction will give a recurring or terminating decimal?
Reduce the fraction to its simplest form - that is, remove any common factors between the numerator and denominator. If the denominator now is a factor of some power of 10, that is, if the denominator is of the form 2a*5b then the fraction will me a terminating decimal. If not, it will not.
Why are some fractions recurring and some terminating?
A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.A fraction is terminating when the fraction, in simplest terms, has a denominator whose only prime factors are 2 and 5. This is related to the fact that our decimal system is based on the number 10 = 2 x 5. Any other prime factor in the denominator - 3, 7, 11, etc. - will be recurring.
How fractions are related to repeating decimals and terminating decimals?
Fractions are related to repeating decimals in the sense that a fraction can be represented as a repeating decimal if the denominator has prime factors other than 2 or 5. For example, 1/3 can be represented as 0.3333..., with the 3s repeating infinitely. Terminating decimals, on the other hand, are fractions that have denominators which are powers of 10. For example, 1/4 can be represented as 0.25, which terminates after two decimal places.
What is the rule for the denominator of terminating decimals?
It must be of the form 2a*5b where a and b are non-negative integers. That is to say, it must be a number whose only factors are 2 or 5.
What can you conclude about rational numbers that have terminating decimals?
Their denominators have prime factors of 2 or 5.
How can you tell if a decimal is repeating or terminating?
That depends how the decimal is defined. If you have a fraction, and convert it to a decimal:* If the fraction, in simplest terms, only has the prime factors 2 and 5 in its denominator, the corresponding decimal number is terminating. This is related to the fact that 2 and 5 are the factors of 10 (the base of our decimal system). For example, a denominator of 2, 4, 5, 8, 10, 16, 32, 125, 625, 20, etc., will be terminating.* If there is any other prime factor in the denominator, the corresponding decimal number will repeat periodically. This is the case with denominators such as 3, 6, 7, 9, 11, 12, 13, etc.
What is a terminating decimal?
A terminating decimal number is a decimal number with a finite number of digits after the decimal point. For example: 95.3652 It is an exact multiple of a (positive or negative) power of 10. For example: 95.3652 can be written as an exact fraction of 953652 / 10000, or 953652 * 10-4. Rational numbers where the simplified denominator is not a factor of a power of 10 (i.e. where the denominator has factors that aren't divisible by 2 or 5, and are not common to the numerator) are not terminating decimals. For example: - 1/3 (0.333333.....) does not terminate - the sequence of '3's repeats endlessly. Notice that the denominator is a multiple of 3 (and the numerator isn't), so it does not divide any power of 10. - 103/70 (1.4714285714285...) does not terminate. The sequence of numbers '714285' repeats endlessly. The denominator does have 2 and 5 as factors, but also 7 (which is not a factor of the numerator), so it does not divide a power of 10. Irrational numbers (such as π=3.14159265.....), are also not terminating decimals. There is an infinite number of numbers after the decimal point, but unlike fractions, there is no infinitely recurring sequence.
If a fraction's numerator and denominator have no factors other than one in common can the fraction be simplified?
If a fraction's numerator and denominator have no factors other than one in common, the fraction cannot be simplified except if the denominator is 1, in which case the fraction can be simplified to the whole number of the numerator.
What are four different types of rational numbers?
1. An integer:1,2,7,980,-566. 2. A terminating decimal:1.1,98.1719,-181.9. 3. A fraction with a denominator that has no prime factors other than 2 or 5:1/5,1/8,56/95. 4. A constant that is terminating decimal:pi,e
What is a fraction that has no common factors in the numerator or the denominator?
If the numerator and denominator are prime numbers and not equal then they don't have common factors (except 1 which would be a common factor even if the numerator and denominator were prime numbers).
How can you tell if a fraction is going to be a terminating or non terminating?
Here are two ways: 1) First reduce the fraction to lowest terms. That is, cancel out all common factors between the numerator and denominator. If the denominator has a prime factor other than 2 or 5, it will not terminate. Otherwise it will terminate. (If the denominator is 1, it will also terminate.) 2) Let's say the denominator is d and assume the numerator and denominator are integers. Start doing the division and carry it out to d places. If it hasn't terminated yet, it never will. For example, if you divide by 30, carry out the division to 30 decimal places. It will terminate by then if it is ever going to. Of course, reducing the fraction will minimize the number of decimal places that you need to calculate.
