1.Add the followinf fractions: 2/9+ 5/7+ 13/3?

Question

2.Convert the following fraction to equivalent fractions, each with the LCD as the common denominator: 7/3,8/6

10 points first answer

mixed number:example 2 1/5

Answer 1

mutliply by 63:

63(2/9+ 5/7+ 13/3) = 14/63 + 45/63 + 273/53

= 332/ 63

Answer 2

I really don't understand the point behind this question, but here goes:

2/9 + 5/7 + 13/3 = 2/9 + 39/9 + 5/7 = 41/9 + 5/7 =
(41*7+9*5)/63 = (287+45)/63 = 332/63.

Now 332 = 166*2 = 83*4 while 63 = 9*7 = 3*3*7 have no common factors, so this is the reduced form.

And I did all that w/o a calculator;)

As for 2, the common denominator of 7/3 and 8/6 is 3, since 8/6 = 4/3. Then both expressed w/ that denominator are 7/3 (unchanged) and 4/3.

Answer 3

2/9+ 5/7+ 13/3?

2/9 + 5/7 + 13/3 = find common base, 9*7 = 63 so..

63/9 = 7
63/7 = 9
63/3 = 21

so 2/9 + 5/7 + 13/3=

2*7/9*7 + 5*9/7*9 + 13*21/ 3*21 =

14/ 63 + 45/ 63 + 273 / 63 =

(14+45+273) / 63 =

( 59 + 273 )63 =

332/63 = thats it, the simplest form

Answer: 332/63 or 5.27 round to two decimals

*still confused? write back

Answer 4

1,. 2/9 + 5/7 + 13/3
common denominator = 63
63/9 = 7 63/7= 9 63/3= 21
14/63 + 45/63 + 273/63 = 332/63
2. lcd= 12
because 4x3 = 12 and 6x2 = 12
7/3=28/12 8/6=16/12

Answer 5

1. You need to have a common denominater to add fractions..
the LCD of 9,7,and 3 is 63
2/9 (multiply numerator and denominator by 7)
2/9 = 14/63

5/7 (multiply numerator and denominator by 9)
5/7 = 45/63

13/3 (multiply numerator and denominator by 21)
13/3 = 273/63

now, that they all have the same denominator, you can add the numerators
(14 + 45 +273)/13

332/13

2. the LCD of 3 and 6 is 6
7/3 (multiply numerator and denominator by 2)
14/6

leave 8/6 as is

Answer 6

1. 2/9 + 5/7 + 13/3
= (2*7 + 5*9 + 13*3*7)/9*7
= (14 + 45 + 273)/63
= 332/63

Answer 7

2/9 + 5/7 + 13/3
LCD is 9*7 = 63
14/63 + 45/63 + 273/63
(14+45+273)/63
332/63

Answer 8

1.332/9 or 36 and 8/9
2.14/6 and 8/6