Va rog frumos ,dau coroana

Răspuns:
Explicație pas cu pas:
a)3/5+4/5=7/5
b)-7/4-5/4=-12/4=-3
e)-7/4+5/4=-2/4=-1/2
c)5/16+3/16=8/16=1/2
f) 5/16-3/16=2/16=1/8
g) 1/2-1/4=2/4-1/4=1/4