Răspuns:
Explicație pas cu pas:
a)1/2 +2/3=3/6+4/6=7/6
b) 1/2 + 3/4=2/4+3/4=6/4=3/2
c)3 1/2-3/4=7/2-3/4=14/4-3/4=11/4
d)2/3*3/4=2/4=1/2 ( se simplifica 3)
e)4/9:2/3=4/9*3/2=4*3/9*2=2/3 ( dupa simplificari)
f)5 3/8 -3 5/16-1 7/12=43/8-53/16-19/12=43*6/48-53*3/48-4*19/48=
(258-159-76)/48=23/48