问题
解答题
计算: (1)16÷(-2)3-(
|
答案
(1)原式=16÷(-8)-3+1
=-2-3+1
=-4;
(2)原式=
-a+1 a-1 a(a+1) (a+1)(a-1)
=
-a+1 a-1 a a-1
=
.1 a-1
计算: (1)16÷(-2)3-(
|
(1)原式=16÷(-8)-3+1
=-2-3+1
=-4;
(2)原式=
-a+1 a-1 a(a+1) (a+1)(a-1)
=
-a+1 a-1 a a-1
=
.1 a-1