anonymous
  • anonymous
OK need more help What is 3/8 +5/7? is it 8/15.
Mathematics
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anonymous
  • anonymous
OK need more help What is 3/8 +5/7? is it 8/15.
Mathematics
jamiebookeater
  • jamiebookeater
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
Ty M
KonradZuse
  • KonradZuse
That is not correct.
KonradZuse
  • KonradZuse
both denominators must be the same.

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KonradZuse
  • KonradZuse
when we add and subtract they must be the same, multiplying you do not.
cwrw238
  • cwrw238
you must find the lowest common multiple ( LCM of 8 and 7
anonymous
  • anonymous
so would it be 1/7?
cwrw238
  • cwrw238
you can only add the top numbers when the denominator is the same
KonradZuse
  • KonradZuse
nope that isn't correct.
cwrw238
  • cwrw238
LCM = 7*8 = 56
KonradZuse
  • KonradZuse
Lets find the LCD(Least Common Denominator) HINT: If we cannot find a number lower, we usually multiply the bottom numbers, so in this case 7*8 =?
KonradZuse
  • KonradZuse
cwrw trying to steal my Q!
cwrw238
  • cwrw238
now you need to convert 3/8 to something over 56
anonymous
  • anonymous
so 61/56 ? Im lost
KonradZuse
  • KonradZuse
correct.
cwrw238
  • cwrw238
ok - sorry - you carry on
KonradZuse
  • KonradZuse
:p
anonymous
  • anonymous
ty all
KonradZuse
  • KonradZuse
Do you undertstand how you got that answer though?
anonymous
  • anonymous
Yes and no? 56yes but no to sure on the 61
anonymous
  • anonymous
So if you divide 25/6 by 5 is it 5/6?
anonymous
  • anonymous
ty
KonradZuse
  • KonradZuse
well actually I wouldn't say that.
KonradZuse
  • KonradZuse
normally the trick when you have multiple denoms you do this. A/B/C = A *C/B
KonradZuse
  • KonradZuse
Sorry I said yes, when I was checking my answer it seemed to give me that, and the other one I thought.
KonradZuse
  • KonradZuse
So 25 / 6 / 5 would be 25 * 5/6
anonymous
  • anonymous
so would it be 25/30?
KonradZuse
  • KonradZuse
What is 25*5
anonymous
  • anonymous
125
KonradZuse
  • KonradZuse
/6
anonymous
  • anonymous
so 125/6?
KonradZuse
  • KonradZuse
yes.
KonradZuse
  • KonradZuse
http://www.wolframalpha.com/input/?i=%2825%29%2F%286%2F5%29 Depending how you put it into Wolfram you could get 5/6, though I'm not 100% sure why..
KonradZuse
  • KonradZuse
anonymous
  • anonymous
OK ty
jim_thompson5910
  • jim_thompson5910
3/8 + 5/7 (7/7)*(3/8) +5/7 21/56 +5/7 21/56 + (5/7)*(8/8) 21/56 + 40/56 (21+40)/56 61/56 So 3/8 + 5/7 = 61/56
KonradZuse
  • KonradZuse
haha not that part :P. 25/6/5 :)

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