Question

va rog frumos sa ma ajutati ​

Answer 1

Răspuns:

Explicație pas cu pas:

In fiecare caz se rezolva mai intai paranteza, apoi restul calculului.

a)

(12/25 : 4/5) : 9/35 = (12/25 x 5/4) : 9/35 = 3/5 : 9/35 = 3/5 x 35/9 = 7/3

b)

12/25 : (4/5 : 9/35) = 12/25 : (4/5 x 35/9) = 12/25 : 28/9 = 12/25 x 9/28

= 27/175

c)

(25/36 : 7/16) : (60/49 : 162/7) = ((25/36 x 16/7) : (60/49 x 7/162)

= 100/63 : 10/189 = 100/63 x 189/10 = 30

d)

(11/12 : 13/18) : 22/33 = (11/12 x 18/13) : 22/33 = 33/26 : 22/33 = 33/26 x 33/22 = 33/26 x 3/2 = 99/52

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e si f te las sa le faci singur.