(-3)的三次方-0.75*[(-三分之二)的二次方-2的三次方]-0.375

速度!!!
2024-12-05 07:25:41
推荐回答(1个)
回答1:

(-3)的三次方-0.75*[(-三分之二)的二次方-2的三次方]-0.375
= -27 - 3/4 x [ 4/9 - 8 ] - 3/8
= -27 - 3/4 x [ - 68 /9 ] - 3/8
= -27 + 3/4 x 68/9 - 3/8
= -27 +17 /3 - 3/8
= -27 + ( 136 - 9) /24
= -27 + 127 /24
= -27 + 5 + 17/24
= - 22 + 17/24
= -21 又 24分之 17