a)
1/2+1/4+1/8=4/8+2/8+1/8=7/8
1/2=4/8
1/4=2/8
b)
1/3+2/5+7/15=5/15+6/15+7/15=18/15
1/3=5/15
2/5=6/15
c) 7/12+11/24+1/8=14/24+11/24+3/24=28/24
7/12=14/24
1/8=3/24
d)
1/2+2/3+1/6=3/6+4/6+1/6=8/6
1/2=3/6
2/3=4/6
Aduci la numitorul comun si aduni numaratorul.
