Răspuns:
Explicație pas cu pas:
a) 1/6+1/9=(3+2)/18=5/18 numitor comun =18
b)2/9+4/15=(5×2+3×4)/45=(10+12)/45=22/45 numitor comun=45
c)3/8+5/6=(3×3+4×5)/24=(9+20)/24=29/24 numitor comun=24
d)1/2·1/4+1/8=1/8+1/8=2/8=1/4 numitor comun=8
e) 2/5·3/2+7/10=3/5+7/10=(2×3+7)/10=13/10 numitor comun=10
