please help in math??!!!!?

Question

how do you find the common denominator??: 2/3, 4/5
how do you find the least common multiple?: 5, 8
how do you find the greatest common factor?: 12, 32
whats an algorithm?: a/b x c/d=a/b x c/d ????
how do you rename answers as mixed numbers or whole numbers?

Answer 1

common denom? well you need the bottom number to be the same. so what is the first number both denoms have in common? 15. so you change the denoms to 15, in order to do this to 2/3, you multiply bottom by 5. remember, whatever you do to the bottom you must do to the top. so then you would get 10/15 is first fraction. the second would be 12/15.

well to rename mixed numbers or whole numbers you must know what they are. whole numebrs are for example 8, 38, 343, etc..

mixed numbers are numbers left in fractions. for example 30/15, 40/10. to rename from a mixed number to whole, we'll use the mixed numb 40/10. you simply divide, 10 goes into 40, four times. so the whole number is 4.

4 = 40/10


to go from whole to mixed you can just put the whole number given over 1. if you are given the whole numb 9, you can make it mixed by doing 9/1.

Answer 2

An algorithm is a general rule which can be applied to find a solution to any member of a class of similar problems. For example, in your problem, the algorithm is a/b x c/d = ac/bd. So, if we were given any two fractions in that form, we could find their product by simply substituting the four numbers in for a,b,c and d and then multiplying and dividing according to the algorithmic rule. Computer programs often use algorithms to solve computational problems. They also use them to sort and store data.

One can rename fractional numbers, or answers by writing them a different way. For example, the fraction 10/3 can be rewritten on paper as the mixed number 3 1/3, but we interpret it in our minds as 3 + 1/3, because 3 actually divides into 10 three times with a remainder of 1. To convert the mixed number back to fraction form, we simply multiply 3 by 3 and add 1 to it to get the numerator. Of course, our denominator doesn't change.

A fraction like 15/3 can be rewritten as a whole number, in this case 5, because 3 divides evenly into 15 five times, with a remainder of 0. So 15/3 is the same as 5 + 0/3 = 5 + 0 = 5.

Answer 3

2/3 and 4/5 you find what they have in common when multiplied by 2 or 3. But what you do to the bottom you also do to the top. So that one is 10/15 and 12/15

LCM is the number that they have in common when multiplied by 2 and so on. That one would be 40

GCF is the number that both can be divided by. The highest number. That one would be 4.

Answer 4

1) multiply the denominators together (3x5 = 15)

2) same as 1. (5x8 = 40)

3) factorize 12 = (2x2x3) factorize 32 (2x2x2x2x2)
you have 2x2 in common - so that is the common factor
2x2 = 4

4) huh?

5) mixed = 1-1/2 , whole = 3/2