(-5/1+2/3-5/6+3/8)*(24*5/9-24*2/9+24*2/3)
问题描述:
(-5/1+2/3-5/6+3/8)*(24*5/9-24*2/9+24*2/3)
好的+++++分
错了,是(-5/12+2/3-5/6+3/8)*(24*5/9-24*2/9+24*2/3)
答
(24*5/9-24*2/9+24*2/3)
=24/9*(5-2+6)
=24/9*9
=24
原式=(-5/1+2/3-5/6+3/8)*24
=-5*24+2*24/3-5*24/6+3*24/8
=-120+16-20+9
=-140+25
=-115