Răspuns:
Explicație pas cu pas:
a = 1/3 +13/6 -1/2 = (2+13-3)/6 = 7/6
b = 16/5 +7/5 -16/3 = (3*16+7*3 -5*16)/15
= (48 +21 -80)/15 = (69 -80)/15 = -11/15
c = 31/6 -28/9 -2/9 = (3*31 -2*28 -2*2)/18
= (93 -56 -4)/18 = 33/18 = 11/6
1. a+b-c = 7/6 -11/15 -11/6 = (5*7 -2*11 -6*11)/30
= (35 -88)/30 = -53/30
2. a-c+(1+b) = a+b-c + 1 = -53/30 + 1
= (-53 +30)/30 = -23/30
etc.
