Aesthetic.exe wrote:sweet tea wrote:Seymoir wrote:I HAVE A QUESTION!
TYPE OF QUESTION:(answer here e.g.. Math, sciences)
Math, rational numbers
YOUR QUESTION:Recently we have been learning about multiplying/dividing rational numbers, except I was not really listening during class so I missed the "technique" My class used to properly/accurately multiply/divide fractions with negative/positive signs. Could someone give me a technique I can use? I know how to add negative/ positive fractions I'm just having trouble with multiplying and dividing them.
multiplying/dividing simple fractions is pretty simple; you don't need to have a common denominator for it.
for multiplying, what you do is multiply all the numerator values together, and then all the denominators. your answer should be the product of the numerators over the denominators.
ex. (3/4)*(6/10)=(3*6)/(4*10)=(18/40) and don't forget to simplify! =(9/20)
division is like multiplying but you have to
flip the values of the divisor (the number after the divide symbol). once you place the numerator in the denominator and the denominator in the numerator, you multiply them the same way as i mentioned before.
ex. (3/4)/(6/10)=(3/4)*(10/6)=(30/24)=(5/4).
i hope this helps!
Oh it does! Thanks!!! But i have some more questions, so what if a whole number is involved? Would you just turn it into a improper fraction and do exactly as you said before? And what if a negative sign is involved? Would it be the same or is there a different way of doing it when a negative is involved?
Yes, if there's a whole number, it will be easier to do math on if you turn it into an improper fraction. When you get your answer, you can always simplify it there.
What to do with the negative sign depends on the action being taken. You deal with negatives in fractions the same way you deal with negatives in whole numbers, though.
So if you have a negative times a negative, it will turn into a positive. If you have a negative times a positive, you should end up with a negative. If you have a positive plus a negative, you can consider that a positive minus a positive. If you have a positive minus a negative, you can consider that a positive plus a positive. Etc.
Maybe if you have a few problems/examples, we could help work through them with you so you have something to reference? ^^