Respuestas

  • Usuario de Brainly
2013-12-13T18:29:38+01:00
3,4:2,5-4,5:5

* 3,4 = 34/10= 17/5
* 2,5 = 25/10 =5/2
*4,5 = 45/10 = 9/2

Reemplazando:

(17/5)÷ (5/2) - (9/2)÷ 5

Recuerda que:

(a/b)÷(c/d) = (a/b) x (d/c)

Entonces:

(17/5)÷ (5/2) - (9/2)÷ 5

(17/5) x (2/5) -  (9/2) x (1/5)

34/25 - 9/10

2(34)/2(25) - 5(9)/(5)(10)

68/50 - 45/50

(68-45)/50

23/50 = 0,46 =  Solucion