Răspuns:
Explicație pas cu pas:
2
a)4/15+2/3=(4+2·5)/15=14/15
b) 16/93+3/31=(16+9)/93=25/93
c)7/32-2/32=5/32
d)23/42-15/42=8/42=4/21
3
a)10/24+5/24=15/24=5/6
b)52/42+39/42=91/42
c)16/60+9/60=25/60=5/12
d)5/24+2/24+9/24=16/24=2/3
e)14/60-9/60=5/60=1/12
f)32/60-27/60=5/60=1/12
g)40/105-12/105=28/105=4/15
h)14/12-9/12-1/12=4/12=1/3
