je narrive pas arresoudre ce probleme

Exercice 14

a)
(8-3)/2= 5/2   


b)
(6+1)/3 =7/3      
   
  
c)
(9-4)4  = 5/4


d)
(28+1)/4 =29/4            


e)
(16-9) /3=7/3


f)
 (28+5) /7 = 33/7

a = 4-3/2 = 8/2-3/2 = 5/2

b = 2+1/3 = 6/3+1/3 = 7/3

c = 9/4-1 = 9/4-4/4 = 5/4

d = 7+1/4 = 28/4+1/4 = 29/4

e = 16/3-3 = 16/3 -9/3 = 7/3

f = 4+5/7 = 28/7 +5/7 = 33/7