DOAR PUNCTELE A, B D...... URGENT PLZ ex 2

a)1/8 + 1/2 = (1+1•4)/8=5/8
b)1/6 + 1/2 = (1+1•3)/6=4/6=2/3
d)4/3 • 5/2 + 6 = 10/3 + 6 = (10+6•3)/3 = 28/3=9 întregi 1/3