Răspuns :

Explicație pas cu pas:

a) 5/12-5/24=10/24-5/24=5/24

b) 26/21+13/14=52/42+39=42=91/42=13/6

c) 4/15+3/20= 16/60+9/60=25/60=5/12

d) 5/24+1/12+3/8=5/24+2/24+9/24 =16/24=2/3

e) 7/30-3/20=14/60-9/60=5/60=1/12

f) 8/15-9/20=32/60-27/60=5/60=1/12

g) 8/21-4/35= 40/105-12/105=28/105=4/15

h) 7/6-3/4-1/12=14/12-9/12-1/12=4/12=1/3