计算-8+[-1/7-(-1/6-0.25×2/3)÷7/3]-(8+9)

问题描述:

计算-8+[-1/7-(-1/6-0.25×2/3)÷7/3]-(8+9)

1.8÷2.7-17÷51
=2/3-1/3
=1/3
9/8x(4/3+6/7-0.25)
=9/8x(4/3+6/7-1/4)
=1467/672
满意请采纳.