Respuestas

  • Usuario de Brainly
2013-03-05T20:58:22+01:00

25/21 :15/7=  lo resolves cruzado

25 * 7 / 21*15 =

175 / 315 = 5/9

 

5/3 de 60= lo multiplicas

300/3 = lo dividis

100

 

  7/9 de 27/14=

7* 27 / 14 *9

189 / 126 = 3/2

 

 (4/3.2.1/9) : (8/7 : 4/14) =

(4/3 * 19/9) : (8/7 : 4/14) =

12/19 : 4 = 1/3

 

(3/4+1/2) . 8/5 - 2/5 . 10/6 =

5/4 . 8/5 - 2/5 . 10/6 =

2  - 2/3 =

6/3 - 2/3 = 4/3

 

espero que te sirva, salu2!!!!

 

 

          

2013-03-05T23:02:18+01:00

25/21 :15/7=  lo resolves cruzado

25 * 7 / 21*15 =

175 / 315 = 5/9

 

5/3 de 60= lo multiplicas

300/3 = lo dividis

100

 

  7/9 de 27/14=

7* 27 / 14 *9

189 / 126 = 3/2

 

 (4/3.2.1/9) : (8/7 : 4/14) =

(4/3 * 19/9) : (8/7 : 4/14) =

12/19 : 4 = 1/3

 

(3/4+1/2) . 8/5 - 2/5 . 10/6 =

5/4 . 8/5 - 2/5 . 10/6 =

2  - 2/3 =

6/3 - 2/3 = 4/3

 

espero que te sirva, salu2!!!!