Question

When you have 13pi/3 -2pi , why do you get 7pi/3? Wouldn't it be 11pi/3? I am so confused.

Answer 1

what is 13/3 - 2 ?

Answer 2

since 3/3 = 1, this can be written as:

13/3 - 3/3 - 3/3

(13 - 3- 3)/3

Answer 3

i see where you got the 7 from I just understand why you did 3/3. Does it have something to do with having to have the same denominators in order to subtract?

Answer 4

its simpler for us to work the subtraction yes. common denominators place all the values we are to work with on a common playing field.

13/3 and 2/1 , i say are not wearing the same pants and we have to redress them

Answer 5

13/3 is not equal to 13

13-2 = 11, is what you prolly saw in your mind; but by doing that you make up your own problem by changing 13/3 into 13

Answer 6

So what happend to the 2pi in the midst of all this?

Answer 7

pi is pi is pi ... we factored it out and worked the fractions

Answer 8

\[\frac abx+\frac mnx=x(\frac ab+\frac mn)\]

Answer 9

so then it becomes 1 over 1 which you multiply by 3 to get the 3/3 to have the same denominators so you can subtract?

Answer 10

\[\frac{13}{3}-2\]\[1=\frac 33\]
\[-1=-\frac 33\]
\[-2=-1-1=-\frac 33 - \frac 33\]
\[\frac{13}{3}-2=\frac {13}3-\frac 33-\frac 33\]

Answer 11

OR, yeah, we multiply 2 by 3/3

Answer 12

\[\frac{13}{3}-2(1)=\frac{13}{3}-2(\frac 33)\]
\[\frac {13}3-\frac 63\]

Answer 13

ok thank you so much! i think i understand it now! i really appreciate your help.

Answer 14

good luck