速度啊
第1个回答 2009-10-16
(-24又6/7)÷(-6)-3.5÷(7/8)*(-3/4)
=(-174/7)/(-6)-3.5/(7/8)*(-3/4)
=(174/7)*(1/6)-3.5*(8/7)*(-3/4)
=29/7-4*(-3/4)
=29/7+3
=50/7
=7又1/7
=(-174/7)/(-6)-3.5/(7/8)*(-3/4)
=(174/7)*(1/6)-3.5*(8/7)*(-3/4)
=29/7-4*(-3/4)
=29/7+3
=50/7
=7又1/7