问题
解答题
附加题: (1)计算:1-99+(-2); (2)化简:x+2x-
|
答案
(1)1-99+(-2)
=1-99-2
=1-101
=-100;
(2)x+2x-
x1 2
=(1+2-0.5)x
=2.5x.
附加题: (1)计算:1-99+(-2); (2)化简:x+2x-
|
(1)1-99+(-2)
=1-99-2
=1-101
=-100;
(2)x+2x-
x1 2
=(1+2-0.5)x
=2.5x.