通分50/120,75/120,48/120,8/120,33/120,35/120
分子和为249,249/3=83
50/120与33/120,75/120与8/120,48/120与35/120
也就是5/12与11/40,5/8与1/15,2/5与7/24.应该不对.
通分50/120,75/120,48/120,8/120,33/120,35/120
分子和为249,249/3=83
50/120与33/120,75/120与8/120,48/120与35/120
也就是5/12与11/40,5/8与1/15,2/5与7/24.应该不对.