(12/5+19/1)×12+19/7 这题怎么简算?

问题描述:

(12/5+19/1)×12+19/7 这题怎么简算?

(12/5+19/1)×12+19/7 =12/5×12+19/1×12+19/7 =5+19/12+19/7 =5+1 =6