1+2/3=3/3+2/3=5/3
1-3/5=5/5-3/5=2/5
2+1/5=10/5+1/5=11/5
3-6/7=21/7-6/7=15/7
Succes!
Explicație pas cu pas:
1+2/3=3/3+2/3=(3+2)/3=5/3
1-3/5=5/5-3/5=(5-3)/5=2/5
2+1/5=2*5/5+1/5=10/5+1/5=(10+1)/5
3-6/7=3*7/7-6/7=21/7-6/7=(21-6)/7=15/7
