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How do you know which unit of conversion factor must be in denominator?
Wiki User
∙ 9y ago
Here is an example of a unit conversion. You want to convert, say, 10 feet to inches, and you know (or look it up) that 1 foot = 12 inches. What you have to do is to multiply either by (1 foot / 12 inches) or by (12 inches / 1 foot), since either of this is equivalent to multiplying by 1 - in other words, the result won't change (it will represent the same measurement).
If you multiply by (1 foot / 12 inches), you get units of square feet divided by inches - not very useful. If, on the other hand, you multiply by the reciprocal, i.e., (12 inches / 1 foot), the feet cancel, and the only units left are inches.
In summary, you put the unit of the ORIGINAL measurement into the denominator, to make them cancel. Or just try it both ways, and see in which of the two options the units cancel.
Wiki User
∙ 9y ago
Anonymous
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How do you know which unit of conversion factor must be in the denominator when you're doing a conversion problem?
These are the units which are used for the measurement that you are converting FROM.
Must a conversion fraction equal one?
No. It would be very unusual for a conversion factor to equal one.
If both the numerator and denominator of a fraction are even is the fraction in simplest form?
No. This cannot be. If both the numerator and denominator of a fraction are even, both are divisible by 2, and the fraction must reduce to a simpler form. It must reduce. Let's look at a couple. 2/4 = 1/2 6/26 = 3/13 22/166 = 11/83 434/9252 = 217/4626 It turns out that all even numbers are divisible by 2, so any, that is, every fraction with an even number in the numerator and the denominator can be reduced at least one "step" by dividing both numerator and denominator by 2. Another way to look at this or say it is that all even numbers have 2 as a factor, so you'll be able to factor out a 2 from both the numerator and denominator of a fraction if both numbers are even. There is no way not to do this.
When do you need a common denominator?
The denominators must be the same before you can add or subtract fractions.
What is the answer to 1 third plus 1 forth?
1/3+1/4 In order to solve a math problem with different denominators(the bottom digit of a fraction) you first must change both fractions to have the same denominator. In order to find the same denominator, you must find what is known as the least common multiple of each denominator. The least common multiple of 3 and 4 is twelve. So you must multiply each fraction to get the denominator the same. 4/12+3/12= 7/12
How do you know which unit of a conversion factor must be the denominator?
It is the units for the measurement which you are converting FROM.
How do you know which units of a conversion factor must be in the denominator?
The denominator must contain the unit that you wish to cancel in the numerator of the other number.
How do you know which unit of conversion factor must be the denominator?
The unit that is used in the denominator is the one to cancels the unit that appears in a numerator.
How do you know which unit of conversion factor must be in the denominator when you're doing a conversion problem?
These are the units which are used for the measurement that you are converting FROM.
How do you which unit of conversion factor must be the denominator?
It must be the unit of the measurement that you are converting FROM.
How do i know which unit of conversion factor must be in the numerator?
The numerator must contain the unit INTO which you are converting.
How do you know which unit of conversion factor must be in the denominator?
The unit that is used in the denominator is the one to cancels the unit that appears in a numerator.
How do you know which unit of conversion factor must be a conversion factor?
Assuming you are talking about stoichiometery a conversion factor is often a number with two units. For example a conversion factor could be Miles per hour (Miles/hour). If you had miles and needed to convert to hours you would multiply the miles by Hours/miles so that the miles would be canceled out (miles/miles = 1). Then your units left would be hours. Or vice versa. There are other factors like this in chemistry like grams/mol Mol/liter etc. To put it shortly the conversion factor denominator is always paired with the numerator.
What is the rule for the denominator of recuring decimals?
They must have at least one factor other than 2 and 5.
Which unit of a conversation factor must be in the denominator?
It is the unit of the measurement which you are converting FROM.
Must a conversion fraction equal one?
No. It would be very unusual for a conversion factor to equal one.
How can you add two fractions with denominators of 10 and end up with a sum whose denominator is 5?
A fraction with denominator 10 must have an odd numerator for otherwise its numerator and denominator would have 2 as a common factor and it would be simplified so that it would no longer have 10 as a denominator. So you are adding two odd numerators, both with 10 as the denominator. The sum of two odds is always even, so the result will be an even sum with 10 as the denominator. So in the answer, 2 is a common factor of the numerator and denominator and the answer can be simplified. If there is no other common factor, then the answer must have a denominator of 5.
