Răspuns:
a) aducem fractiile la acelasi numitor comun
²⁾7/12-³⁾1/8=14/24-3/24=11/24
e) introducem intregii in fractie si aducem la acelasi numitor comun
=(5·6+5)/6-(1·4+1)/4=²⁾35/6-³⁾5/4=70/12-15/12=55/12
i) introducem intregii in fractie si aducem la acelasi numitor comun
(5·6+1)/6-(1·3+1)/3=31/6-²⁾4/3=31/6-8/6=23/6
