问题 解答题
计算:
(1)12-(-16)+(-4)-5
(2)(
2
3
-
1
4
-
5
6
)×12

(3)-54×2
1
4
÷(-4
1
2
)×
2
9

(4)-16-(1-
2
3
1
3
-|(
1
2
)
2
-
1
2
|
答案

(1)12-(-16)+(-4)-5

=12+16-4-5

=28-9

=19;

(2)(

2
3
-
1
4
-
5
6
)×12

=

2
3
×12-
1
4
×12-
5
6
×12

=8-3-10

=-5;

(3)-54×2

1
4
÷(-4
1
2
)×
2
9

=54×

9
4
×
2
9
×
2
9

=6;

(4)-16-(1-

2
3
1
3
-|(
1
2
)
2
-
1
2
|

=-1-

1
3
×3-|
1
4
-
1
2
|

=-1-1-

1
4

=-2

1
4

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