简便计算18/17÷19+1/19×16/17

问题描述:

简便计算18/17÷19+1/19×16/17

18/17÷19+1/19×16/17
=18/17×1/19+1/19×16/17
=1/19 ×(18/17+16/17)
=1/19 × 2
=2/19