(7/8)-(1/17)+(9/8)-(6/17)

问题描述:

(7/8)-(1/17)+(9/8)-(6/17)
要简便运算的,

(7/8)-(1/17)+(9/8)-(6/17)
=(7/8)+(9/8)-(1/17)-(6/17)
=2-(1/17)-(6/17)
=2-(7/17)
=27/17