Răspuns:
Explicație pas cu pas:
i)
7/12 - 5/18 = 21/36 - 10/36 = 11/36
j)
7/24 - 5/18 = 21/72 - 20/72 = 1/72
k)
1/25 - 1/35 = 7/175 - 5/175 = 2/175
l)
3/14 - 9/49 = 21/98 - 18/98 = 3/98
m)
14/15 - 7/9 = 84/90 - 70/90 = 14/90 = 7/45
n)
11/4 - 61/25 = 275/100 - 244/100 = 31/100
o)
15/4 - 51/14 = 105/28 - 102/28 = 3/28
