(1/69+2/71)*23+25除70分之1
问题描述:
(1/69+2/71)*23+25除70分之1
答
(1/69+2/71)*23+25除70分之1
=1/69×23+2/71×23+25×70
=1/3+46/71+1750
=71/213+138/213+1750
=209/213+1750
=1750又209/213