Răspuns:
a 1+4/6=1+2/3=(3+2)/3=5/3
(6+4)/6=10/6=5/3
b. 3+15/2=(6+15)/2=21/2
3+7,5=3+75/10=(30+75)/10=105/10=21/2
c 4+6/9=4+2/3=(12+2)/3=14/3
(36+6)/9= 42/9=14/3
d 1+12/18=1+2/3=(3+2)/3=5/3
(18+12)/18=30/18=10/6=5/3
e 2+10/15=2+2/3=(6+2)/3=8/3
(30+10)/15=40/15=8/3
f 3+9/21=3+3/7=(21+3)/7=24/7
(63+9)/21=72/21=24/7
g 2+30/45=2+2/3=(6+2)/2=8/3
(90+30)/45=120/45=8/3
