(57+38/39)÷19能简算的要简算
问题描述：
(57+38/39)÷19能简算的要简算
答
=57/19+（38/39）/19
=3+2/39
=80/39 行不
答
(57+38/39)÷19
=(57+38/39)x1/19
=57x1/19+38/39x1/19
=3+2/39
=3又2/39