Răspuns:
c)
7/18 - 3/2 - 11/9 + 4 =
Numitor comun 18 :
(7-27-22+72)/18 =
30/18 =
5/3
d)
-2/21 - 3/7 + 5/42 - 9/14 =
Numitor comun 42 :
(-4-18+5-27)/42 =
(-44/42) =
(-22/21)
e)
-7/11 - 1/4 + 1/2 - 5/22 =
Numitor comun 44 :
(-28-11+22-10)/44 =
(-27/44)
f)
2/7 - 1/14 + 5/6 - 13/42 =
Numitor comun 42 :
(12-3+35-13)/42 =
31/42
