Răspuns:
Explicație pas cu pas:
a)
3/4 - 1/2 = 3/4 - 2/4 = 1/4
2/3 : 1/4 = 2/3*4/1 = 8/3
3/4 + 8/3 = 9/12 + 32/12 = 41/12
41/12*6/41 = 6/12 = 1/2
b)
1,(5) = (15 - 1)/9 = 14/9
17/3 + 14/9 - 2 = 51/9 + 14/9 - 18/9 = 47/9
47/9 : 47/3 = 47/9*3/47 = 3/9 = 1/3
