(13分之8+39分之7+26分之3)x78要具体运算步骤
问题描述:
(13分之8+39分之7+26分之3)x78要具体运算步骤
答
(13分之8+39分之7+26分之3)x78
=8/13*78+7/39*78+3/26*78
=8*6+7*2+3*3
=48+14+9
=71