when adding fractions such as 13/8 11/18=24/8=1/13

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13/8 + 11/18
= (13 x 9)/(8 x 9) + (11 x 4)/(18 x 4)
= 117/72 + 44/72
= 161/72
= 2 17/72

Question is unclear.

13/8 + 11/8 = 24/8 = 3

13/8 + 11/18 = 234/144 + 88/144 = 322/144 = 161/72

13/8+11/18 =

find a lcd

117/72+ 44/72= 161/72= 2 17/72

The way your question is written is not coherent, but I'll try on the basis of what I think you mean.

You must find a common denominator between 8ths and 18ths.
13/8 = 117/72 and 11/18 = 44/72

117/72 + 44/72 = 161/72 = 2 and 17/72


If you meant to write 13/8 + 11/8 = 24/8 = 3

That makes a nice neat problem.

When adding (or subtracting) fractions you need to find a common denominator. I can't tell what fractions you are trying to add above .. however, if you are adding 13/8 to 11/18 a common denominator would be 72.
13/8 + 11/18 =
13/8 -----> 13/8 x 9/9 = 117/72 13/8 = 117/72
11/18 -----> 11/18 x 4/4 = 44/72 11/18 = 44/72

117/72 + 44/72 = 161/72 (which would have to be reduced)

The fractions that you list above ... 13/8 does not = 11/18,
24/8 = 3 ... 1/13 is not equal to any of the listed fractions.
Hopefully the hint about finding a common denominator will answer your question - if not post again.
GOOD LUCK !!

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Since you never really stated the problem (there are no plus signs) nor specifics, I am going to assume that the following is the problem.

What is (13/8) + (11/18)

8 = 4 x 2 18 = 3 x 3 x 2. So the least common denominator (lcd) is
3 x 3 x 4 x 2 = 9 x 8 = 72.

Now to prepare for addition we change the fractions form but not their quantity so that both are above 72.

3/8 = (9 x 3) / (9 x 8) = 27/72

11/18 = (11 x 4) / (18 x 4) = 44/72

(27/72) + (44/72) = ((27 + 44) / 72) = (71/72)

So 3/8 + 11/18 = 71/72 <<<<< I hope that this was what you wanted.

13/8 + 11/18

Find a common denominator. What is the smallest number that both 8 and 18 go into?

8, 16, 24, 32, 40, 48, 56, 64, 72
18, 36, 54, 72

8 x 9 = 72
18 x 4 = 72

LCD = 72

(13/8)(9/9) + (11/18)(4/4)

= 117/72 + 44/72

= 161/72

This is the answer, in cannot be reduced.

You have to find the least common denominator. what number will 8, 18, 8, and 13 all go into? Then you take the original denominator of each number and divide it into the new denominator and multiply that number by the numerator. then you take each fraction by the new numerator and keep the common denominator