(1)计算 (- 1 2 ) -2 - 2 3 *0.125+201 0 0 -|-1| ;(2)先化简,再求值:

2025-06-23 08:49:21
推荐回答(1个)
回答1:

(1)原式=4-8×0.125+1-1=4-1+1-1=3;
(2)原式=
(m+1 ) 2 -4m
m(m+1)(m-1)
(m+3)(m-1)
m+3
=
(m-1 ) 2
m(m+1)

当m=-
1
2
时,原式=
(-
1
2
-1 ) 2
(-
1
2
)×(-
1
2
+1)
=-9.