Question

resolva e simplifique,se possível

6/9+3/5-2/15=

7/9+2/12-6/24=

4/5+6/6-1/15=

6/8+4/6-3/12=

Answer 1

1° 6/9+3/5-2/15=
51/45
2° 7/9+2/12-6/24=
50/72
simplificado=25/36
3° 4/5+6/6-1/15=
52/30
simplificado=26/15
4° 6/8+4/6-3/12=
28/24
simplificado= 7/6

Answer 2

a)    6/9 + 3/5 - 2/15 =

     2/3 + 3/5 - 2/15 =  -------> mmc(3,5,15 ) = 15

   10/15 + 9/15 - 2/15 = 19/15 - 2/15 = 17/15

b)   7/9 + 2/12 - 6/24 =

    7/9 + 1/6  - 1/4 =  --------> mmc(4,6,9) = 36

 28/36 + 6/36 - 9/36 = 34/36 - 9/36 = 25/36

c)   4/5 + 6/6 - 1/15 =

    4/5 +  1  - 1/15 = 4/5 + 14/15 = ----------->mmc(5,15) = 15

------------------------12/15 + 14/15 = 26/15

d)   6/8 + 4/6 - 3/12 =

     3/4 + 2/3 - 1/4 = 2/4 + 2/3 = ---------> mmc(3,4) = 12

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨ 6/12 + 8/12 = 14/12 = 7/6