👤

cine ma poate ajuta
calculați:
1/2+3/4=
1/3+2/5=
2/3+3/4=
5/2+3/5+2/3=
3/2+1/4=
3/5+2/15=
1/6+5/18=
1/2+4/5+7/10+11/20=
5/8+7/12=
4/9+11/15=
9/14+5/21=