问题
解答题
计算: (1)12-(-16)+(-4)-5 (2)(
(3)-54×2
(4)-16-(1-
|
答案
(1)12-(-16)+(-4)-5
=12+16-4-5
=28-9
=19;
(2)(
-2 3
-1 4
)×125 6
=
×12-2 3
×12-1 4
×125 6
=8-3-10
=-5;
(3)-54×2
÷(-41 4
)×1 2 2 9
=54×
×9 4
×2 9 2 9
=6;
(4)-16-(1-
)÷2 3
-|(1 3
)2-1 2
|1 2
=-1-
×3-|1 3
-1 4
|1 2
=-1-1-1 4
=-2
.1 4